ZC engine ....help :(
 

My ZC swap is not runngin right. I have replaced the timing belt gave it a basic tune up and this is what i got. Stock zc with a intake. It misses(feels like it shuts off actually) right at 2100 like clock work. ABove or below that rpm it runs great. under light throttle however between say 2700-3300 it feels like it is hesitatin and missing, almost like hitting a fuel cut. any sensors....or anythign i could have missed? please help me!

Re:ZC engine ....help :(
 

what car/year/model

what ecu

Re:ZC engine ....help :(
 

1988 crx si i know i need the pg7 ecu but i have been running the stock one for like 12k miles and it has been fine up till now!

Re:ZC engine ....help :(
 

is it throwing any CEL's?

I had the same problem with a B20 swap, and I noticed that if I left the tank under 1/4 full it would do it. Keep more fuel in it, and no problems.....could be a vapor problem, I dont know, but I just keep it around 1/2 tank and im fine.

BTW, this should go into the hybrid/tech section.
ask a mod to move it.

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Re:ZC engine ....help :(
 

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Re:ZC engine ....help :(
 

???

Re:ZC engine ....help :(
 

Sup byatch!

Re:ZC engine ....help :(
 

So everything was running fine then this started to happen? or did u change something and it started to happen after that?

Re:ZC engine ....help :(
 

everything was fine up till this. AFter this started i changed the fuel filter...no effect.....adjusted the timing....no effect....changed the cap/rotor/wires/plugs...no effect.....then my timing belt blew.....slapped a new one on there...no bent valves....same problem though....I am at a total loss for what could be happening...:( oh i ran two tanks of heavy fuel system cleaner through the car as well...no effect1 :(
I have a new fuel pump, i need to install it though i thought that might be causeing this(what do you think?) it is strange because it is totally RPM dependant!

Re:ZC engine ....help :(