Fuel problems

AWAGERS01

MEMBER
1994 CHEVROLET S-10
6 CYL
4WD
AUTOMATIC

1994 Chevy S10 4X4 when idling it misses real bad at full speed runs great.

Thursday, June 30th, 2011 AT 12:30 AM

3 Replies

JDL

MECHANIC
16,098 POSTS

How long since a tune-up? Any applicable mil codes? You should be able to check those codes, yourself, if your still fully obd1 compliant. Clean the throttle-body and idle air control.

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Saturday, August 27th, 2011 AT 6:56 PM

JAMES LINDSAY

MEMBER
5 POSTS

I did everything, spent, too much money, for parts I replaced it all, EGR ECM, TPS injectors spiders, you name it, I have done it, and a faulty, fuel filter, after use, restricts, the fuel, and makes it back, pressure and, ruins your fuel pump. Everyone having this problem, change the fuel filter first.

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Monday, February 17th, 2020 AT 5:36 PM

TOUGHDIVER

MECHANIC
224 POSTS

Hello,

It could be the spark plug gap check the spark plug gap of excessive gap and regap plugs specs 1.14 mm or .045". There could also be a vacuum leak sometimes vacuum leaks can be hard to locate and detect with visual inspections. Use a vacuum gauge and measure the intake manifold vacuum it should be 17 to 21 psi. if lower there is a vacuum leak. Intake gaskets can leak in places like between ports or through the lifter valley or it could be low compression check the engine compression could have worn rings. Compression should be no less than 100 PSI and the lowest reading should not be lower than 80% of the highest reading. I'm attaching repair guides below on check vacuum and engine compression.

https://www.2carpros.com/articles/how-to-test-engine-compression

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Thanks
Joe T.

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Tuesday, February 18th, 2020 AT 3:55 PM