98 chevy 1500 4.3 wont start. (Full Version)

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98 chevy 1500 4.3 wont start.

  

Tuner -> 98 chevy 1500 4.3 wont start. (4/4/2008 6:29:30 PM)


I have a 98 p/u with a 4.3 V6 that won't start. I have fuel pressure and spark. The computer has no codes. I removed the top of the plenum to access the injectors (the infamous spider system). I will clean them tomorrow. I am just checking to see if anyone has some ideas. All comments are appreciated.

  
northey87 -> RE: 98 chevy 1500 4.3 wont start. (4/4/2008 7:38:54 PM)

Welcome to the forum!!! Sounds like it could be electrical, which is always a pain.

Tuner -> RE: 98 chevy 1500 4.3 wont start. (4/6/2008 9:31:38 AM)

Thanks Northey87.
Iv'e read on another post about two ground wires near the goose neck causing simular problems. I did notice one of those wires cut so I'll try that. Also I'll moniter the fuel pressure while it's running for the few seconds it runs on occation.

rockmaples -> RE: 98 chevy 1500 4.3 wont start. (4/14/2008 7:56:10 PM)

Plug in the block heater.

I had the same problem with the same truck.

I also replaced the coil (one hour) and now I am waiting for rain to see if that is where the problem was.( It would not start when there was moisture in the air)

Peter

Tuner -> RE: 98 chevy 1500 4.3 wont start. (4/16/2008 7:21:00 AM)

Still working on it. Have fuel, fuel pressure, and spark. Checked timing, compression. Haynes says I should have 5 volts, (on AC gage), out of crank sensor. I have 12 volts going into sensor during cranking but have tried two other used sensors. Has anyone experienced this before?????

jmack91z28 -> RE: 98 chevy 1500 4.3 wont start. (4/16/2008 7:50:30 AM)

Whats it doing?  Is it even turning over?  If it's completely dead then its possibly a ground wire.  Need more info to help you out.  What about the history of repairs you've made with the truck?  What else has been replaced prior to this issue so that we can rule some things out.

Tuner -> RE: 98 chevy 1500 4.3 wont start. (4/16/2008 8:31:05 AM)

The truck cranks over fine. It was running fine and when shut off would not re-start. The plugs, cap, rotor, wires, ignition module, crank sensor, Computer (original chip from old computer). No codes while scanning verified TPS, MAP, MAFS, IAC, are all working. I'm almost to the point of buying a Ford!

jmack91z28 -> RE: 98 chevy 1500 4.3 wont start. (4/16/2008 10:47:29 AM)

quote:

ORIGINAL: Tuner

I'm almost to the point of buying a Ford!


Probably the most ignorant thing i've heard all day.  Go ahead, buy the Ford, and pay more for parts and have more problems with it and it will be more difficult to work on.

How about the fuel pump relay?  Does it maintain correct fuel pressure the whole time until it shuts off?

When it shuts off, will it turn over to try and start up or is it just dead?

Tuner -> RE: 98 chevy 1500 4.3 wont start. (4/16/2008 11:35:47 AM)

There's no rhym or reason. Currently there's no spark. Sometimes it will start and the last time it ran until I shut it off. If you try to throttle it when it's running it dies. Fuel pressure is at 60 PSI the whole time. The engine foules out. I'm at a loss on this one. Whwn it starts it idles without missing a beat.

jmack91z28 -> RE: 98 chevy 1500 4.3 wont start. (4/16/2008 1:36:32 PM)

Man that sucks, could it be a bad connection on the coil or something to that effect?  Idling perfect but cuts off when you give some gas is something i've never heard of..  How about any vaccum leaks..

  

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