1991 Chevy S-10

S-DIMEMAN

MEMBER
1991 CHEVROLET S-10
4 CYL
2WD
MANUAL
260,132 MILES

I have an 1001 chevy s-10 it has 260,000 plus miles okay it had a colappes lifter I replaced the pushrods and lifters also replace the dist cap and the igition rotor wires and spark plugs also the egr valve because it was trowing aa code for the egr valve my problem is that now when the engine is cranking it wont fire plug the coil to let the lifters to pump up and no backfire more like a poof of a backfire when I plug in the coil then this poof thing is when it occurs I took off my oil cap and seen my lifters moving and I made sure my firing order was correct from the service manual 5 times all good please help me

3 Replies

MMPRINCE4000

MECHANIC
8,548 POSTS

This is the 2.5 4 cylinder?

Lifters:

Did you try spraying starting fluid in TB? Check spark?

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Friday, February 12th, 2010 AT 6:07 PM

S-DIMEMAN

MEMBER
4 POSTS

I changed the firing order to the fring order you have the manual shows different also now when I try to start it it keeps acting like it wants to fire but dont also the brand new egr valve puffs out smoke please help me I need this truck

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Friday, February 12th, 2010 AT 6:26 PM

MMPRINCE4000

MECHANIC
8,548 POSTS

Try some starting fluid down TB, if it runs a few seconds, then fuel problem, if not then ignition.

Did you move distributor during repair?

Remove #1 spark plug, put ratchet and socket on balancer, with ign. Off, rotate engine with ratchet while you have finger in spark plug hole. When you feel air through hole, rotate balancer until timing mark is at 0 degrees.
Remove dist. Cap and rotor should be pointing directly at #1 spark plug wire. If not, rotate dist. Until it does.

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Friday, February 12th, 2010 AT 6:43 PM