crappy idle with fresh rebuild

lil_boxx

New Member
5+ Year Member
hello i have a 92 cx with a z6/b7 mini me the bottom end is fully rebuilt has 8 miles on it the issue im having is the car runs great idles right around 900 rpms when cold once the temp gauge moves up past the first line by cold if you push the clutch in or leave it out and rev the engine at all and let off the gas the car drops to about 150-200 rpms or sometimes just dies all together i bought a new chipped ecu from phearable.net as my other ecu was toast this ecu has no engine lights nothing wrong with it at all ive cleaned the iacv and fitv its got a brand new fuel pump and filter.... im just stumped on this one its been 3 months of just beating my self up to figure it out.........


ive got it narrowed down to distributor, timing (which i know very little about), evap purge solenoid, fuel pressure regulator, bad ground wire, clutch/throw out bearing........

anyone else think it might be anything listed above? i have a brand new clutch and bearing havent put it in yet im ordering a new pressure regulator with a gauge on it for the hell of it....... any help is really appreciated and thanks in advance
 

lscivic48

New Member
not the distributor, purge solenoid and timing are out of the question. the purge won't make the car shut off. if the car is running fine under 1k rpm than timing and the distributor are out. are all the vacuum lines hooked up properly and what is your fuel pressure at the rail?
 


RonJ

Banned
Why aren't you using a stock P28 ECU rather than a chipped ECU?

What CEL codes are thrown?
 

lil_boxx

New Member
5+ Year Member
Why aren't you using a stock P28 ECU rather than a chipped ECU?

What CEL codes are thrown?
the stock p28 ecu i had was throwing a code 10 even with a brand new iat sensor so i opted to get the phearable ecu with the new phearable ecu there is no engine codes at all

the fuel pressure hasnt been tested but its got a brand new fuel pump and filter as far as i know theres only a few vacuum lines and they are hooked up correctly according to the helms manual
 


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