meowta.ia

To preface this, I never had a "perfect" idle before installing new injectors, but now its just being odd to me. Could my new injector settings be causing this? I am having two main issues here.... (Maybe more, who know)

1. Car will Idle up to operating temp fine. (A bit rich, but it at least idles). I can usually adjust the IAC Duty cycles & fueling on the VE table to get a better AFR, but every time I make an adjustment, I am getting a really rough idle now. This is reflected in the cold start log.

2. Car is now at operating temp, so I go to take it out for a drive. Everything feeling fine, not dying at stops. About 5 minutes into my drive, the car just refuses to idle. Seems to be running fine outside of idle, but I have to use throttle to keep it alive at the stops.

I'm sure I'm missing something here, but figured I'd just throw up a post here and see what you all think.

1991 1.6, speedyefi ECU, Turbo, flowforce 640cc injectors

Any other information you all would need, just let me know. Tune & log from cold start, Drive, and post drive attached.

jdmtom

What's your injector open time set to?

I put some 550cc injectors in today, and I had the open time set to 0.6. This caused me issues, seeing it back to 1 solved it

meowta.ia

I'm set at 1.1 per flowforce:
https://goflowforce.com/instructions

moocow

Have you boost leak tested post injector install? I pinched the manifold to injector O-ring when I put my injectors in. Gave me tuning headaches until I caught it and fixed it.

meowta.ia

What kind of "tuning" headaches?

I am really only having issues with my idle. I can drive the car, get about the same AFR as before (after I reworked my VE table), but just can't get the idle to be stable.

I don't think I have any vacuum leaks as I'm still hitting the same KPA as I was before the install. I also tried spraying a bit of MAF cleaner around the injectors to ensure they were not leaking as I was told there would be a small surge in RPM if there was a leak.

Matsie

You can try spraying some carb cleaner or deodorant onto the injectors. If you hear a rise in rpm you have a vaccuum leak.

estrias

yo I'm having the EXACT same problem with the exact same setup. did you ever figure it out? I'm stumped
oh and what are your injector characteristics like?