Engine sutters after a quarter throttle

JAY WAR812

MEMBER
1988 CHEVROLET S-10
2.8L
6 CYL
2WD
MANUAL
223,000 MILES

So, when my truck warms up aby throttle after 1/4 or 1/2 it spits sputters from a stop it wants to jerk, I have to feather throttle and clutch. I replaced the plugs, wires, cap, button, vacuum lines, MAP sensor, fuel pump, and fuel filter. Another thing: if I’m driving and turn ignition off then on pop clutch and drive again it will take full throttle and run perfect for about 10-15 seconds then starts sputtering again. Any help will be greatly appreciated.

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,874 POSTS

Hi,

Wow, you have already done a lot to the vehicle that I would have suggested. Since it runs normally when you turn it off and then on for a short period of time, it sounds like it could be related to an electrical issue.

I realize you replaced the fuel pump, but have you confirmed it is within spec? Also, are there any odd smells or smoke from the exhaust when this happens?

Let me know. Also, try scanning the computer to see if there are diagnostic trouble codes stored. This vehicle has an OBD1 system and doesn't require a scanner to get codes. All you will need is a short jumper wire or even a paper clip.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Try scanning and let me know if there are codes and what they are.

I will watch for your reply.

Take care,

Joe