1998 Chevy Truck STARTING TRUCK

KENTUCKYPLUMBER

MEMBER
1998 CHEVROLET TRUCK
V8
4WD
AUTOMATIC
145,000 MILES

I own 1998 CHEVY Z71 4x4, it wont start but cranks for ever.I can pour little gas in the top of the breather and it fires up and will stay runnin, it also throws out black soot looking stuff from tail pipe.I've had it at several different mechanics put prob 6 diff fuel pumps on and spent a fortune trying to get it fixed cpl of thousand and still wont run. Can you help, thanks jeff

Sunday, February 3rd, 2008 AT 5:12 PM

3 Replies

BLACKOP555

MECHANIC
10,386 POSTS

Are you putting top of the line pumps in it? And of how many months years are between the pumps? And when they are replaced does it run good?

A bad fuel filter, fuel pressure regulator or running hte tank with low gas in it is a good way to kill the pump.

Also do you have a inline High pressure pump?

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Sunday, February 3rd, 2008 AT 6:52 PM

KENTUCKYPLUMBER

MEMBER
2 POSTS

Pumps are ussually installed every 8 or 9 moths, carquest pumps, no inline high pressure pump its all stock, whats the reason for black soot comin out of muffler?Why does it it start when I poour gas in throttle body? Does mass air sensor have anything todo with it?

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Sunday, February 3rd, 2008 AT 7:07 PM

BLACKOP555

MECHANIC
10,386 POSTS

Black exhaust/soot is usually a sign of the vehicle running rich, seems not the case since gas put in the throttle body is making it start.

It starts when gas is poored in the throttle body because it bypasses everythign on the engine, no relays or anything.

The MAF is the mas air flow sensor, it is used to detect the mass of air going into the throttle body and helps adjust fuel mixture, it would not cause a vehicle not to run, it would stop it from running properly

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Sunday, February 3rd, 2008 AT 8:01 PM