89 yj 2.5 won't stay running. Does

[Bryce Heinz]

Bought this not running. Replaced chassis ground and it fired up. All it does is want to idle. Randomly I can drive it for about 20 minutes but most of the time you give it has it sputters and dies. I have replaced the fuel pump and icm with no change. I have tested the air temp. Coolant temp and map sensor and all seem to be working. I was going to adjust tps but bolts stripped out. Ordered a new sensor from napa hoping it comes with new bolts. The tps was out of spec and may be the issue. Anything else I can check?

 

[JPNinPA]

Some basic maintenance.
Clean the battery terminals and the opposite ends of the grounds esp the engine side.
Clean the TB and IAC. Work the TPS my working the butterfly full open to closed like 25-30 times. They sometimes get dirt in them. What rpm does it idle at? Check for a vac or intake leak. Even a leak between the exhaust and intake will cause issues.
Check your spark plugs. What color are they end what gap?
The cpk could be going. But that would happen randomly idle or not.

Any codes?