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[ratcityrex]

99 civic
jap b16 swap

with stock p2t ecu runs great but get a solid cel of p1607 = toast ecu
throw a jumper in it with a chipped p28 and no mater what crome bin I throw in it the idle surges but no cels

no fitv to fuck with, so thats not it, un pluged the iacv and set the idle, set base timing, everthing looks good, but I guess my question is if the iacv was dirty wouldnt it do the same thing with the p2t ecu pluged in?

also tried burning a chip with iacv disabled in crome and it still did the same thing. But i guess thats the quarks u get with crome free

[Joseph Davis]

Might be a bad OBD1 ECU IACV circuit, all the failures I've seen resulted in CEL 14 but there are a few bits involved that might cause that problem without a CEL.

[ratcityrex]

Yeah my next step is to try the same map with my know working ecu. Just was wondering of there was something real simple Im over looking.

These kids think im a tuner.... no mater how many times I tell him im just a dude with the stuff to burn chips and edit rev limiter and launch control. All these fucking kids want a launch control @ 3-4k, and a shift light 2k b4 redline im like wtf is the use in that? and everyone of them goes its cool to roll up on someone at a stop light and rev launch control on them.... fucking ricers. But it gets me a 4 bottles of my favorite beer every time I have me burn them a chip

[HiProfile]

But it gets me a 4 bottles of my favorite beer

Up your price already.

Plug the iacv, see what that does. It's a 2-wire iacv right? All the idle surge I've encountered was always from some air leak beyond the TB. It was also inpossible to find the leak with ether and co2. Check all hoses, then check the tb & intake gaskets.

[PhilStubbs]

I agree with that guy. All idle surge problems I have had was either intake leak(99% of the time) or coolant lines not right.

[ratcityrex]

But why wouldnt it do it with stock Ecu then?

[Joseph Davis]

But why wouldnt it do it with stock Ecu then?

Might be a bad OBD1 ECU IACV circuit, all the failures I've seen resulted in CEL 14 but there are a few bits involved that might cause that problem without a CEL.

[ratcityrex]

I got you on that the first time jd, I was just proving a point that it wasn't a tb or intake mani gasket leak.

[HiProfile]

So you're asking why an OBD2 ecu deals with air leaks better than an obd1 ecu? Maybe Honda figured it out & fixed it after 5 years of obd1 problems?

Following JD's thought, test it with another obd1 ecu. Then use some special paper gasket lube/seal that has anti-stick properties. Or some good ol' permatex.