Hey guys,
So a friend and I did a D16A6 swap into a 1991 CRX HF. The engine was totally complete, except for the air intake and throttle body which came from a Z6.
When we start the car with the D15 ECU, it idles OK, but we don't want to run it under load, as the fuel mix will probably be incorrect.
When we start the car with the D16 ECU, idle bounces up and down, evening out slightly after it warms up. Under load, it bogs down in the 2-4k RPM range, and then starts behaving more normally in the higher revs.
The car has one of those AEM style air intakes, and I'm hearing a hissing from the filter area at idle. I've been reading that this is normal, but I don't remember that sound when the D15 was running in it, though I could be wrong.
- Mechanical timing is correct, ignition timing is correct, valve lash was done. I'll recheck all those things, but fairly certain they are right.
- TPS is from the D16 engine, but is adjusted correctly.
- We've bled the coolant
- Plugs are new, but I'll pull and check the gap.
On my list for the weekend is to recheck ignition timing and TPS, maybe swap the TPS out for the old one from the D15, pull the IAC and bench test it if I can, and check for any obvious vac leaks.
Another concern is that we are using the injectors from the D15, which are apparently 190cc, while the injectors that the D16 ECU is expecting may be 240cc?
Just wanted to put this to the forum and see if there were any obvious suggestions, or anything obvious we are overlooking.
Appreciate the help.
So a friend and I did a D16A6 swap into a 1991 CRX HF. The engine was totally complete, except for the air intake and throttle body which came from a Z6.
When we start the car with the D15 ECU, it idles OK, but we don't want to run it under load, as the fuel mix will probably be incorrect.
When we start the car with the D16 ECU, idle bounces up and down, evening out slightly after it warms up. Under load, it bogs down in the 2-4k RPM range, and then starts behaving more normally in the higher revs.
The car has one of those AEM style air intakes, and I'm hearing a hissing from the filter area at idle. I've been reading that this is normal, but I don't remember that sound when the D15 was running in it, though I could be wrong.
- Mechanical timing is correct, ignition timing is correct, valve lash was done. I'll recheck all those things, but fairly certain they are right.
- TPS is from the D16 engine, but is adjusted correctly.
- We've bled the coolant
- Plugs are new, but I'll pull and check the gap.
On my list for the weekend is to recheck ignition timing and TPS, maybe swap the TPS out for the old one from the D15, pull the IAC and bench test it if I can, and check for any obvious vac leaks.
Another concern is that we are using the injectors from the D15, which are apparently 190cc, while the injectors that the D16 ECU is expecting may be 240cc?
Just wanted to put this to the forum and see if there were any obvious suggestions, or anything obvious we are overlooking.
Appreciate the help.