98 chevy 1500 4.3 wont start.

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98 chevy 1500 4.3 wont start.

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Chevrolet Forum >> Chevy Trucks, Vans & SUV's >> Silverado >> 98 chevy 1500 4.3 wont start.

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

Tuner

Posts: 7
Joined: 4/4/2008
Status: offline

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.

Post #: 1

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

northey87

Posts: 874
Joined: 10/17/2007
Status: offline

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

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''''95 1500 Silverado, 350, flowmaster Force II exhuast, S&B CAI.

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

Tuner

Posts: 7
Joined: 4/4/2008
Status: offline

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.

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Post #: 3

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

rockmaples

Posts: 12
Joined: 3/21/2008
Status: offline

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

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Post #: 4

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

Tuner

Posts: 7
Joined: 4/4/2008
Status: offline

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?????

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Post #: 5

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

jmack91z28

Posts: 164
Joined: 2/27/2008
Status: offline

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.

_____________________________

1994 K2500 454 4L80E 14bolt 10.5" w/ 4.10's

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

Tuner

Posts: 7
Joined: 4/4/2008
Status: offline

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!

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Post #: 7

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

jmack91z28

Posts: 164
Joined: 2/27/2008
Status: offline

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?

_____________________________

1994 K2500 454 4L80E 14bolt 10.5" w/ 4.10's

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

Tuner

Posts: 7
Joined: 4/4/2008
Status: offline

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.

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Post #: 9

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

jmack91z28

Posts: 164
Joined: 2/27/2008
Status: offline

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..

_____________________________

1994 K2500 454 4L80E 14bolt 10.5" w/ 4.10's

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Post #: 10