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Engine dies when heated-up!?
Car: Honda, Accord, 1996, 2.2L non V-Tech - Back to Fix-It - Honda Accord Repair Manuals
Q.I have a 1996 Honda Accord with a LX 2.2L non V-tech engine - 241,000 miles. Water pump failed and I replaced pump, all belts, etc. Decided to remove the throttle body and clean it also, which included the IAC and Fast Idle Thermo Valve. Turned the key and engine immediately jumped to full throttle. 6000 rpm and climbing.
Did a visual check for vacuum leaks, throttle plate closed and moves freely with linkage. Turned the FITV washer/seat in completely (everybody says that works). Runs smoothly around 2000 rpm and drops dead when engine heats up.
Bought a new FITV. Immediate full throttle rpm again. Took the cover off the brand new FITV. Factory set at exactly 2 1/2 turns to bottom seat. Turned it in till snug. Again, 2000 rpm and drops dead when engine heats up. Had enough run time to do vacuum leak test with propane. No leaks detected.
Bottom line question: Can this be caused by a timing/valve/other isssue or am I simply failing to find a major vacuum leak?
I already checked/done: TPS checks good. No CEL and no OBDII codes. No issues with sticking throttle plate or linkage. IAC is working properly when AC is activated. Bled coolant (burped engine) each time hoses were disconnected. New TB gasket.
I think when the Fast Idle Thermo Valve seat is turned in completely it slows rpm enough to run. When the engine reaches normal operating temp, I beleive that valve activates enough to shut down the engine. ???
Answer No timing or valve issue will cause this.
The engine has a large amount of air entering somewhere.
With the air tube off of the throttle opening, block the holes in the wall of the throttle body and have someone start the engine. If the racing is gone, the IACV or the FIV are allowing the air in.
If it still races, you have another vacuum leak somewhere.
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