Rev/Idle problem Please help!

[yesItsdsm]

So I turn on my car after coming out of Auto-Zone. Idle starts f'ing up. surges up to about 1200 rpms then drops to 500-600 then back up and back down again. So I pull outta the parking lot and in 2nd gear my car starts to stutter horribly. It feels like it bucks when I get on it - at about 4k rpms theres a feeling like the car is pulling back - like as if I downshifted to slow the car down, and then the picks up again and jerks violently. Any ideas? This car is starting to p!ss me off!

 

[King_Milo]

You said it was the ISC that caused all these problems - http://www.dsmtuners.com/forums/showpost.php?p=151089464&postcount=7

I'm interested because I'm having the same 2 problems...idle surge and stuttering past 4-5k. I got a CEL for the ISC so I'm replacing that. But I need to know if that will fix it.

Yeah mine is running pretty good for now ha ha, the ISC from a 3000GT/ Stealth will also work on at least the 1g, dont know about the 2g, and I just so happened to have two spare motors laying around and swapped in a working one and did a full seafoam treatment and its running great.

 

[yesItsdsm]

Yeah mine is running pretty good for now ha ha, the ISC from a 3000GT/ Stealth will also work on at least the 1g, dont know about the 2g, and I just so happened to have two spare motors laying around and swapped in a working one and did a full seafoam treatment and its running great.

got any more "spare"" motors you wanna let go for a decent price?

 

[yesItsdsm]

After weeks my problem has finally been solved. I simply changed the ecu, the battery terminals, and the ground to the firewall. Fixed. My idle is stronger than ever, It revs free, A lot less engine noise. Smoother on the highway too. Thanks for all you guys help.

 

[Defiant]

Ah, interesting. Yes, we tend to forget how crucial good grounds and easy circuits are to modern electrically-controlled engines.