I'm going to borrow a fuel pressure gauge and rule out things like return line restrictions and leaky injectors.
I'm going to borrow a fuel pressure gauge and rule out things like return line restrictions and leaky injectors.
ICHIBAN!
"Now, even more better!"
good idea. My CRX does a simular thing but at WOT it hauls arse. To test my fucking return line i just drained it straight into a fuel container to rule it out
If the ECU works the same way as in the A20, when the engine is cold the ECU uses preset data for fuel. Sensor inputs (MAP, TPS, O2) for calculating fuel are used only when engine is warm -closed loop.
If it ain't broke... I fix it!
Sounds like its time for a OBD1 conversion and tune!
It has to work with the original ECU. The only things that changed are the fuel lines/pump, coil, igniter and exhaust. Everything else is the same.
ICHIBAN!
"Now, even more better!"
Have you tried simply advancing the distributor while it's warm? I don't know if the B20A5 distributor would have the same map or not, but I think the computer will advance timing while cold. Perhaps after it warms up, it tries to retard it, and it goes too far back and starts running like a turd. Otherwise I'm totally fucking stumped. Maybe the ECU is just fucked.
My friend's Civic had intermittent hesitations, and he threw every single sensor at it and every part we could think of, just like you're doing. It turned out to be the ECU.
Wiring in a 3gee coil today. Guess we'll see what happens.
ICHIBAN!
"Now, even more better!"
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