So my problem is that i can drive and motor pulls fine but soon as i come to a stop the engine stutters like drops down to like 300rpms but will rise right back up to 900rpms where it stays and idles but only does it after i drive and push the brake on it drops like that and has idle problem! i changed oil and new plugs and checked my fuel pressure regulator which is a b@m and its set to about 54psi.. is that too high and maybe flooding my engine? or is that too low and set it up higher? idk maybe it could be coolant lines have air bubbles? i never had the problem in over 2 half years and just recently started doing it! i only have one code which is code 43 car is converted down to obd1 and chipped ecu.. as i said never had a problem untill last few days even with the code 43 jumpping on once in a while! code 43 is fuel system problem which is that related with a bad o2 sensor bc i need a new one! would this solve the problem? if anyone can please help me give me some feedback asap i would really appreciate it! thanks in advanced!

 

A bad o2 could cause strange idle problems from dumping too much fuel. 54 psi is high it should be be more like 38-40psi at idle.

 

im leaning towards a bad o2 as well.... and yeah i figured its pretty high i guess ill turn it down and see how it performs! thanks for the feedback

 

bump ttt