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throttle bodies

494 views 7 replies 5 participants last post by  lee303 
#1 ·
finally got my car all finished but it seems to be running really rich, ive tried backing off the screw on the fuel pressure regulator( is this the right way to lean it off) but it doesnt seem to have done anything, i havnt connected the vacuum to the fuel pressure regulator though, does this need to be connected? as i have read it doesnt
 
#4 ·
hmm

you take off the top nut, loosen the botom nut then ajust the screw in the middle of them.

take it you dont have connection to the ecu to reduce fueling that way.

dont move it more than 1/2 a tuern at a time. 5% of FSE boost valves have a reverse thread they were made by acident
 
#5 ·
do you have a guage on the fuel rail? tbh the proper way to lean out the engine is to get it mapped properly, if you back off th fpr you could run too lean at some point in the rv range and melt a piston:eek: did you buy a mapping lead?
 
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