Is the 98 Chevy 5.7 misfire running right?

I have a 98 chevy 1500 5.7. The truck doesnt run right at all. Msifres bad under acceleration. Idle ok when misses when reving and accelerating. I did a full tune up including plugs, wires, cap rotor and a new distributor. With key on i have about 60psi fuel pressure but idleing i only had 50psi.

Why does my Chevy Tahoe keep stalling out?

If your Chevy Tahoe’s engine timing is off, it’s going to stall out, misfire, and altogether not run properly. Here are some of the more common causes of an engine timing problem:

What should I do about my Chevy Tahoe 5.7?

Went through this with my 99 Tahoe with the 5.7. hooked my scanner up to and noticed I had a o2 sensor reading low, but not enough to set the cell off. Replaced all 4 o2 sensors and made it a whole different truck. 4 people found this helpful.

How to help me with a Chevy k1500 misfire?

× Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

Why does my Chevy Tahoe misfire all the time?

But, when the engine gets warm on a hot day, it starts the misfire routine. Appears to be heat related as it will run well all winter. This has been going on for years.

Can a bad crankshaft sensor cause a cylinder to misfire?

Should you feel or hear a brief stutter in the engine, it may be a sign of misfiring cylinders from a bad crankshaft position sensor. A failing crankshaft position sensor cannot provide the right information about piston positioning in the engine, causing a cylinder to misfire.

What’s the misfire code on a 1998 Vortec?

Can someone please help with what I should check next, I have a 1998 Chevy K1500 5.7 Vortec with a misfire, P0300 code for 3 months. runs a little rough, while driving under normal conditions it sputters, hesitates, and also will backfire, under heavy acceleration no noticeable skip, no sputters, and does not hesitate or backfire.

How to fix a 98 Chevy 5.7 Vortec?

I had same problem 97 5.7 vortec. Replaced cam and crank sensors repaired wiring to crank sensor, much better. I put it on co. Outer and it said can and crank sensors were not in sync with eachother adjusted timing got it down to 2 degrees, it can be – 2 or +2 but no more than 2 16 people found this helpful.

Can a Chevy Silverado 1500 lose all power?

See all problems of the 2019 Chevrolet Silverado 1500 . Truck will lose all power, everything will shut off, and then come right back on. It has happened while accelerating into traffic, slowing down turning right and turning left, and while moving straight ahead.

What happens when a Chevy Silverado engine shut off?

The engine shut off, brakes went out, steering locked, all electrical shut off. The truck was dead for approx 4 seconds when it kicked back on on its own. The truck continued down the road like nothing had happened.

Which is the best spark plug for a Chevy 350?

NGK 7397 for Chevy 350 4. Bosch HGR8DQP Spark Plugs 5. ACCEL 0526-4 Spark Plugs for Chevy 350 Loading…

What’s the firing order for a Chevy 5.7?

Chevy 5.7 Firing Order Diagram 16.08

What kind of spark plug does a Chevy have?

Spark Plug, Conventional Resistor, Nickel Alloy Tip, Gasket Seat, 14mm Thread, Chevy, GMC, International, Each

What causes a Chevy Silverado to start without turning the engine?

A fuel delivery problem is usually caused by a clogged fuel filter, no fuel in the tank or a faulty fuel pump. A starter that spins without turning the engine is caused by the starter gear failing to engage the engine’s flywheel.

How to troubleshoot a transmission problem in a Chevrolet?

1 Symptoms. The first sign that you may have a possible transmission problem could be the check engine light coming on. 2 Troubleshooting Steps. The first steps in troubleshooting the Chevrolet transmission problem are to read the fault codes from the Transmission Control Module (TCM) and check the transmission fluid level. 3 Common Problems. …

Why does my 93 GM 3500 box truck not work?

I have a 93 GM 3500 Box Truck, it is a van chassis. Fuel pump quit working, now headlights aren’t. Battery has 13.1v in it. Cranks over and starts with ether, but no gas. I thought fuel pump was out so I bought a new one but haven’t tackled dropping the tank. Watched a youtube video about weak battery causing fuel pump to not work.

Why is my Chevy C / K 1500 not running?

Fuel pump quit working, now headlights aren’t. Battery has 13.1v in it. Cranks over and starts with ether, but no gas. I thought fuel pump was out so I bought a new one but haven’t tackled dropping the tank. Watched a youtube video about weak battery causing fuel pump to not work. So I started checking. I put in a new fuel pump relay.

When to troubleshoot the electrical system in a Chevy Silverado?

This happens sometimes when trailer wiring has been added, causing electrical system problems. Consider having the BCM or Body Control Module replaced if your Silverado repeatedly blows out the same fuses or if it seems like you’re experiencing one electrical problem after another.

Is there no fuel from injectors to start truck?

No fuel from injectors to start truck. When I try and start my 93 Chevy Cheyenne k3500 no fuel come out of the injectors. If I use starting fluid the truck starts and the injectors work great. Has died a couple times while driving, but mostly runs fine and then won’t start one turned off.

What kind of fuel injector does a 4.3L engine use?

This system used on all 4.3L, 5.0L, and 5.7L engines from 1996 to present. This ‘Spider’ assembly has either 6 or 8 individual fuel injectors that feed 6 or 8 nylon fuel lines. The CSFI system does use a MAF sensor.

What causes a fuel injector to go bad?

Right off the bat, I’ll tell you that the most common cause of this happening is usually the PCM (Powertrain Control Module = Fuel Injection Computer) going bad. What Vehicles Can I Apply This Info To?

What are the symptoms of a bad fuel injector assembly?

Symptoms Of A Bad ‘Spider’ Fuel Injector Assembly. The most common type of failure (related to the ‘Spider’ fuel injector) is usually not the assembly itself going bad, but the fuel pressure regulator going bad. The fuel pressure regulator is infamous for leaking fuel from its vacuum inlet nipple.

What causes a fuel injector to misfire and hydrolock?

‘Spider’ Fuel Injector Misfire and Hydrolock (Troubleshooting Case Study) . This case study will help you diagnose a fuel injector (within the ‘Spider’) that’s stuck open and causing a Hydrolock condition. Contents of this tutorial: Important Tips And Suggestions. ‘Spider’ Fuel Injector Basics. Symptoms Of A Bad ‘Spider’ Fuel Injector Assembly.

What makes a truck feel as if it’s missing?

Re: Feels as if Truck is Missing while riding down road. A bad leak on a 5.3 will act up mostly cold and at lower rpm. We’re the proper plugs put in?

Can a GM 4.3L Vortec engine be tested?

This isn’t possible on the GM 4.3L, 5.0L, and 5.7L Vortec engines with a ‘Spider’ fuel injector (the fuel injector is inside the intake manifold plenum and its outside electrical connector doesn’t allow for such a test).

How big is a 7.4 liter Vortec engine?

7.4 Vortec Engine Specs. by Vern Hee. The 7.4-liter engine is known as the General Motors 7400, which was a Vortec-designated engine built from 1996 until 2001 as a truck engine. Vortec technology was first introduced by GM in 1986 in a V-6, 4.3-liter engine called the 4300.

Why is my Chevy C / K 1500 still running?

Running great, but check engine still on. Old oem muffler was rattling at idle for months but still quiet while driving so I put it off. Finally got new aftermarket muffler installed, went out on freeway anf pedal to the metal. Olay!

Is there a removable chip on a 1997 Chevy Silverado?

There is no removable chip on a ’97 PCM. The computer can be reflashed (reprogrammed) with updated software if you have the equipment. Generally, a reflash will not rectify a situation that arose so late in the truck’s life.

What should I replace on my 1998 Chevy k1500?

Here is what has been replaced to try and stop this misfire: spark plugs, spark plug wires twice, distributor cap twice, rotor, ignition coil, EGR, CTS on intake manifold, coolant temp gauge sender, fuel filter, fuel pump, MAF sensor, oil change.

What causes a Chevy Silverado 350 to hesitate?

The two most common causes of hesitation on these vehicles are Throttle position sensor and MAP sensors. Both can be checked with a lab scope, but aon a truck this old you have to weigh whether the money is better spent on two new components rather than testing costs.

What causes an engine to misfire in a new car?

7 Common Causes of an Engine Misfire 1 Bad Ignition Coil (New Cars) / Distributor (Old Cars) 2 Bad Spark Plugs 3 Intake Manifold Gasket Leaks 4 Low Fuel Pressure 5 Injector Problem 6 Low Compression 7 Wrong Air-Fuel Mixture

Why does my Chevy Blazer not go over 20 mph?

Won’t go over 20 mph. Starts right up. New plugs and wires. Never really cuts off. Runs hot but not extremely. Mass air flow is usually an intermitant problem. This sounds more like a stopped up catylist converter. take the cat off and run it, see if it gets hot, most likely that will be the problem]

How to troubleshoot a GM Truck misfire?

This isn’t the only symptom that your GM van, pickup or SUV might experience… here are some more that you might see: P0300: Random Cylinder Misfire. P0301: Cylinder #1 Misfire. P0302: Cylinder #2 Misfire. P0303: Cylinder #3 Misfire. P0304: Cylinder #4 Misfire. P0305: Cylinder #5 Misfire. P0306: Cylinder #6 Misfire. P0307: Cylinder #7 Misfire.

What makes a GM 4.8L misfire engine stall?

P0306: Cylinder #6 Misfire. P0307: Cylinder #7 Misfire. P0308: Cylinder #8 Misfire. Really bad gas mileage. Lack of Power when you accelerate your van, pickup or SUV. Engine may start, run for a few minutes and stall.

What happens when your Chevy Silverado engine goes bad?

So, when it goes bad, it can knock your Silverado’s air fuel ratio off. This could lead to poor fuel economy, the previously mentioned rough running engine, backfiring, a flashing check engine light, and an engine that has no giddy-up and go. 4.

How to start a new Chevy Silverado 1500 question?

Start a new Chevrolet Silverado 1500 question. Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.

Are there any issues with my Chevy Silverado?

Never had issues as long as I treated them right. the 57 Ford refused to break, the 51 Plymouth kept spinning rod bearings. Beat you vehicle, and keep shelling out money. 14 people found this helpful.

Why does my Chevy 350 backfire under load?

When high performance turbo engines are under load they use an excessive amount of fuel which then is transferred into the exhaust system once the throttle is let up on and the engine is de-accelerating. This is a normal event and there is no problem with this condition.

What’s the problem with my 1997 Chevy Silverado?

I have a 1997 chevy 1500 siverado with a 5.7 vortec that has been having a problem for about 6 months now. The truck starts, idles, and revs normally and when accellarating slowly everything works just fine, but once you get past half throttle it falls on its face and acts like it has a clogged fuel filter or bad fuel pump.

What to do with a 98 Chevy 1500?

I want u to clean the air intake valve and idle speed control valve, follow the procedure below.

What causes a Chevy C / K 1500 to bog down?

My truck bogs down (and tries to die) when I give it gas to accelerate off of a stop. There is often a backfire or two when this happens. Pumping the gas does not help. I basically have to crawl through any intersection until it picks up a bit of speed from idle. The truck idles smoothly, and it runs fine once it’s above about 5-10mph or so.

Can a Chevy C / K 1500 run at idle?

There is often a backfire or two when this happens. Pumping the gas does not help. I basically have to crawl through any intersection until it picks up a bit of speed from idle. The truck idles smoothly, and it runs fine once it’s above about 5-10mph or so. If moving at a picking up the speed.

Is there a problem with the Chevy Vortec engine?

3L [&Vortec&] engine, the LU3, which was manufactured from 2003-2014 has been known to [&consume&] excessive amounts of [&oil&]. Owners [&have&] reported the car requiring [&two&] quarts or more of [&oil&] in between normal [&oil&] changes. The excessive [&oil&] [&consumption&] is likely to be caused by the Active Fuel Management system.

How long does a Chevy 4.3L Vortec engine last?

3 vortec is a very strong and reliable motor, proven by it being the longest lasting production vortec engine. Generally, these engines are extremely capable of lasting up to 300,000 miles.

How does the engine control module detect a misfire?

The engine control module is using a lot of sensors to know when to ignite the spark plug and when to inject the fuel into the cylinder and to optimize the air-fuel mixture. To detect a misfire, the engine control module is often using the crankshaft sensor to detect a misfire.

What causes an engine to misfire on one cylinder?

If the misfire is not specific to one cylinder, it’s likely because the engine is not getting enough air or fuel to run properly. That could be because of a failing part of the fuel system.

Is the F150 5.4L misfire issue solved?

Subject: F150 5.4L Misfire issue SOLVED! Report Post | Recommend it! Original thread was back here… http://boards.fool.com/chasing-54l-misfire-29799368.aspx?sor… Much gnashing and grumbling on my part, originally thought I was imagining things… But it was worse at time, forgotten others, but I was seeing my apparent mileage shot…

What is the diagnostic code for a misfire?

Misfires that turn on the check engine light and log a cylinder-specific fault code are the easiest to diagnose. A flashing check engine light and a P0301 to P0312 diagnostic trouble code (DTC) is a surefire indication that one or more cylinders are misfiring. Occasional misfires may pass unnoticed, but a steady misfire is hard to miss.

When does a 6.7L diesel engine misfire?

Some 2011-2016 F-Super Duty vehicles equipped with a 6.7L diesel engine may exhibit a runs rough/misfire condition only during the exhaust regeneration process. This condition typically occurs on light throttle tip in-between 40-70 Mils per hour and will not set diagnostic trouble codes (DTCs).

What causes an engine to misfire on all cylinders?

Low fuel pressure will cause a lean mixture in your engine which will result in misfires on all cylinders. If you have trouble codes for misfires on all cylinders, you will want to check your fuel pressure. 5. Injector Problem Another problem, which was more common five years ago, is injector problems.

Why does my car idle at high idle?

If this tube becomes loose or broken it can leak un-metered air into the engine effectively causing an unbalance (via the mass air flow MAF sensor) in the computer system which can produce fast or slow idle.

I want u to clean the air intake valve and idle speed control valve, follow the procedure below.

What’s the Random Misfire code on a Chevy truck?

I have a Code P0300 which is a Random Misfire Code. The engine idles very rough and you can definitely tell it’s a misfire from the exhaust end. From what I’ve been told is that these engines are notorious for having intake manifold leaks so I went ahead and changed out the intake manifold gaskets and headgaskets since it’s been a very long time.

What’s the misfire code on a Dodge 3.9L?

P0307 Cylinder #7 Misfire. P0308 Cylinder #8 Misfire. Sometimes, even tho’ the engine is suffering a bona-fide misfire, no misfire codes are registered in the computer’s memory and/or no check engine light (CEL) on. Lack of power upon acceleration.

I have a 1998 Chevy 1500 Vortec 5.7 V8 2WD. I have a Code P0300 which is a Random Misfire Code. The engine idles very rough and you can definitely tell it’s a misfire from the exhaust end.

How can I tell if my engine is misfired?

What causes a Ford F150 engine to misfire?

My problem was prolonged by a faulty new spark plug, which caused me to chase my tail. I bought this truck knowing that it had a shuttering problem. It would idle alright, but when I would get between 45-50 MPH, the engine would misfire badly.

What was the problem with my Ford F150?

To save someone some time, the bottom line of the problem was a faulty brand new MotorCraft spark plug. I may have also had a bad COP and spark plug, which I fixed early on. My problem was prolonged by a faulty new spark plug, which caused me to chase my tail.

Is it possible to find a misfire in a Ford?

It’s possible to find a misfire in your Ford, even if there is no check engine light. All you need is an OBDII scanner with Mode 6 function. It is a common situation. You’re driving your F150, F250, E150 van, or Expedition, etc and you can feel the engine skipping here and there.

Why does my Ford F150 misfire at 50 mph?

It would idle alright, but when I would get between 45-50 MPH, the engine would misfire badly. It felt as if I was going over a rumble strip, as someone else described it. If I let off the pedal, the problem would stop. If I pressed the pedal down hard, the problem would stop.

Why does my Ford F-250 keep misfiring # 7?

If the same po30x (7) code remains it’s related to that cylinder mechanical or vacuum or injector or ignition related. So in summary.. Engine mechanical integrity (aka compression) must be established prior to any attempt at diagnosis of a specific misfire code.

What causes a Ford F-250 Super Duty to Misfit?

Broken pistons, broken or worn out piston rings, bent connecting rod. These are all cylinder specific failures. If the compression test, and a dry and wet compression test should be performed, does not show a failure (low compression) then move on to the accessory items that function to allow the engine to operate….

Is the 98 Chevy 5.7 misfire running right?