C/K :: 1998 - Engine Firing But Will Not Run
Feb 24, 2005
I have a 1998 Silverado C1500 with a 5.0L V8. Since last Sunday, I've had two occasions (both first start of the day) where the engine will fire but not run. It turns over, sounds like it's started but immediately dies.
Possibilities???
1) The fuel pump does engage but I lifted the breather off and can't smell or feel any gas in the throttle body. Maybe fuel pressure? It's not all the time though.
2) I checked all relative relays and fuses in the engine compartment...they appear good.
3) After pulling and reinserting the fuses, I filled the bowl up with gas manually and it eventually started..after 15-20 minutes of off-and-on attempts. It doesn't die after it starts and then restarts just fine for a couple of days.
4) I filled up the tank last Saturday and did not have this problem prior to then..could it be bad gas? I have not used any injector cleaner or additive yet.
What could this be????
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Been having issues the past month with the car taking a couple times to start. It's very sporadic. Sometimes I'll only have this issues once a week. Sometimes once every other day.
Engine cranks it's just not firing. Almost like what would happen if you were out of gas. Sometimes it takes 2-3 times. Just yesterday it took about 5-6 times. Once started though the car seems fine. Drives fine, haven't really noticed any hesitation nor has it died while driving.
1.6 automatic
130,000 miles
no CEL on
new plugs at 100,000 miles
Changed the fuel filter when i noticed it happening and ran some fuel treatment cleaner in it.
We took it into the shop and of course every time they checked it out it started up fine. even left the car there for 2 days and started up fine for them. They said they couldn't really diagnose it as it seems ok to them.
Fuel pump going bad? Fuel pressure regulator going bad? Crankshaft position sensor going bad?
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Problem is that cylinder #6 is not firing when engine is hot at operating temperature. Engine shakes lightly but performance remains good.
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I'm not sure at this point what to look at next. This happened overnight, not gradually over time, and apart from running rough the engine isn't making any noises which based on sound, and how fast it happened doesn't make me think its a scoring/compression issue.
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Relays
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Complete tune up.
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The truck starts up fine. then after a minute or so it starts to spit and sputter and back fire through the intake then dies.
What could cause this? Intake manifold gasket leak?
Will a clogged fuel filter cause this?
5.4 ....
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Ignition coil replaced twice in 3 weeks, engine still cuts out randomly and "service engine soon" light flashes on.
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Possible causes according to diagnostic:
coil, plugs, injector, vacuum leak, wires (From memory)
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Just bought this car. The seller said the wires and plugs are new. I will inspect tomorrow when I do the brakes.
Assuming they were replaced it leaves coil, vacuum or injectors.
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199) Ford Ranger will turn over but isn't firing. We've replaced the battery, positive battery cable, distributor, distributor wires, the selonoid inside the distributor, starter selonoid.
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I bought a 01 passat with a bad turbo I drove it home as I was getting home the STOP low oil pressure light came on and I parked it the engine had a lifter rattle but not knocking I went to start next day and Have no fire on first two cylinders (only two I checked), where to start? I pulled coil pack/plug tube out and hooked a plug in to check fire on first 2 cylinders got no spark....
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