Hey everyone I just got done with my B18c swap. But its seems to have problems starting in the cold, or if I don't support the start with the gas pedal. But after it warms up a bit it starts just fine... any suggestions to what it might be?

Check all the things on it... starter, alternator, distributor, you name it and they all came up good...

Swap was done into a 98 EX coupe. The B16A that was in the coupe before never had this problem...

Thanks in advance.

 

What engine computer are you running ?

 

I am running the p73 that came with the engine. It's just really bugging me it'll start only if I support it with the gas pedal and I have to keep on it for about 2-3 minutes than it'll go down to like 200 rpm and sit there like it's gonna die than after another 2-3 minutes it'll jump up to 1500 rpm or so like a normal car would do when the engine is cold started than after it warms up it'll drop to the normal idle 800-1000 rpm.

Than starting it after it's all warmed up it has no problems starting... No CEL nothing all the wires are in correctly everything... Just really stumped now...

 

I am starting to think that it might be a bad sensor... but no CEL so it's going to be hard to troubleshoot... unless someone can tell me what sensor on the engine/location. Thanks