No codes?
Check fuel pressure. Static, idle with vacuum on FPR, idle with vacuum OFF FPR, and pedal down pressure.
Any loping idle?
Check for vacuum leaks.
Quote:
Lopin' idle is an air issue; gotta' be a vacuum leak somewhere.
Block the TB linkage, brick on pedal, anything to get a steady idle, then start sprayin' startin' fluid EVERYWHERE, a little at a time, to find where it's gettin' sucked in, and causin' a brief rev increase.
Vac leak will make a engine lope idle - 20 year old lawn mower, or a new car on the lot...
Find a leak in a tight spot? Try a book of matches. Light the whole book, blow 'em out quick while the match heads are burnin', and see if the smoke feeds into some spot...
|