the other night me and my friend got done swaping a jdm dohc f22b into his 92 prelude si 4ws and we were just test driving it and went to the gas station and one the way back the cat back got disconnected from the cat and the car died and the check engine light went on then we started it back up and the check engine light was on and the car died again. has anyone ever had this problem before or knows what it might be????
also the car has a chipped ecu from a 91 accord ex with a jdm dohc f22b swap

 

sounds as if the O2 sensor itself or the wiring may have been damaged when the exhaust came apart.

 

the exhaust fell off?!?!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">the exhaust fell off?!?!</TD></TR></TABLE>

.....too much....

 

where the cat connects to the cat back the bolts came out
also could a bad tps cause this

 

yes. Id say its more a bad tps than your O2 system. Even if your cat fell off and tour the wires from the wire harness off, it would not send a signal to the ecu, and the ECU would run open loop as a saftey feature.

You having a chipped ECU might not be the case.

Only one way to find out. Put that exhaust back on and wire it back up.

 

nothing happened to the o2 sensor the cat back got disconnected and nothing happened to the down pipe its still connected.
also the o2 sensor isn't on the cat its on the down pipe

 

So your muffler fell off? I dont understand what your issue here is.

 

the cat go disconnected from the cat back nad it was real loud but nothing happened to the o2 sensor because its before the cat

 

so thats the problem? Well fix it.

I though your issue was with the car stalling out.

 

not to be an ***, but if your exhaust fell off there is no telling what else was not done right.

 

i think its the tps it was runnuing fine also this is my first swap im only 16 so of course im gonna make so mistakes

 

I can understand that. Everyone blows their first couple engines up.

Its a very exspensive learning process.

Do you know how to check the TPS?

 

no but during the swap the plug that goes onto the tps cracked so you can slip it on and off the tps plug on the tps and i think it just came off i couldn't check it because it was at night i will check it tommorow also how do you check to see if the tps is good

 

Well fix that.