1990 GMC Safari Q&A
1990 GMC Safari Question: engine wont idle running rough tune up brand new tps new possible cause ?
Problem occurred on Sunday 1/2/2011 the van was trying to stall at a light. Managed to get it home without stopping and when I pulled into the driveway it stalled out. Its been running rather rough and will not idle correctly ever since! Installed new tune up parts, plugs, wire, rotor,cap and then I pulled an error code 22 from the dash lights and replaced the TPS switch check engine light went away and no further fault code and van still running the same! - nitrodave
It sounds like you have some type of electronic problem. You will have to have it check on an electronic scanner ASAP so not to do more damage. Contact my shop and we can schedule you an appointmnet. - Stans Garage