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Username Post: '98 S10 4.3 Cough, Shake, Shudder        (Topic#344133)
Forum Newbie
Posts: 1

Reg: 04-18-17
04-18-17 05:49 PM - Post#2687223    

Hi all. First post and a puzzle for anyone who would like to help.

What I've got: '98 S10, 4.3V-V6, Auto\AC, 115,000 miles that stutters and jerks like a mule.

The truck started to sputter and randomly misfire last year so I changed the plugs, plug wires, rotor, distributor cap with no real improvement. Now it's worse.

For the past few months the engine stutters, shakes, and misfires randomly for about 15 minutes at any RPM above idle. Only code is a random misfire which is obvious. Maybe once it returned an O2 sensor code which I attributed to a rich condition with the misfire but I'm not 100% sure if that assumption is correct.

Since the cold stuttering and misfires started I have replaced the MAF, fuel spider and tried another ignition coil with absolutely no improvement at all. The code is the same - random misfire.

After 15 minutes on the road it runs like a top with lots of power and pep just like it did when it was new.

I am the original owner and have done all the maintenance work myself but now I'm out of options. Anyone have any idea what could cause this? To me it seems thermal. It does it when cold but runs like a rabbit when warm.


Frequent Contributor
Posts: 1183
Age: 59
Loc: Murphy N.C.
Reg: 01-25-14
04-19-17 05:17 PM - Post#2687368    
    In response to Texaz

Welcome, the truck section is further down the page. check the fuel pressure and report back.


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