Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 91 CRX Si swapped in a SOHC ZC now it won’t idle once it’s w › 91 CRX Si swapped in a SOHC ZC now it won’t idle once it’s warmed up
Update:
I cleaned the IAC valve screen (lots of carbon).
Engine started and warmed to operating temp.
Checked timing (a little bit off); adjusted to correct specification.
Result:
engine continues to idle when warmed up.
(still a little low, a tiny bit of surging maybe 500rpm to 600rpm)
I have to do some driving to get the ECU trained on how the new engine behaves.
(that might be part of my overall problem)
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Further info, after test drive:
The car can still stall at idle.
Other than that the new engine seems to be running very well.
Air filter was replaced with a new one.
The ECU seems to be learning a little bit.
I’ll look at valve clearances next.
Retorque the intake manifold (in three equal steps radiating out from lower-center bolt); still waiting on a 12mm crowfoot. So, this might happen some time next week.
3.5mm vacuum tubing is still “in transit” shipped on the 4/27.
I’m thinking of replacing the bistmoto cam with the one from my old D16A6. (maybe, that’s what’s wacking my ECU’s thought process; I’ll wait until I’ve fixed the possible vacuum leaks before doing that.)
Take Care,
Chris