OK, 91 crx si with sohc non-vtec zc. It runs shitty while warming up, but once the temp needle moves, its idles perfect. But even when its warm, it stumbles hard on acceleration. Open the throttle and it just rumbles for several seconds until it starts to rev. Once I get the rpms up, i can hold it there without any problems. Anyone have any ideas? Oh yeah, I used a DX TPS, is there any mods I need to do. Its not throwing any codes, fuel pressure is good, gas is good, new fuel filter, fuel pump is good, so Im just kinda lost on this one. Thanks for any help guys.
-Matt

 

your might want to try replacing the tps with a si or replace your map sensor good luck just a guess correct me if i am wrong probley am

 

Map sensor is good, and I get no CELs. Any other suggestions.

 

BUMP

 

C'mon guys, need some help with this. Any ideas?

 

How are your grounds, coil, ignitor, etc? Is your spark strong? Do you have another ECU to try? Another distributor? What do the plugs look like?

 

Oh, i found the prob, the compression variates by 40 PSI between cylinders 3 and 4.