stockgp Posted April 21, 2007 Report Share Posted April 21, 2007 i've noticed the past 10 days or so i've got a worsening hesitation problem. as the car warms up, it will hesitate pretty badly from a stop. rolling to a stop or going around a turn i have to slow way down for, it will want to stall. it's getting bad enough that i have to drive with two feet to keep it from stalling. i've changed the tps already. it was throwing an ses code last week, but not now. now, i did do a lim gasket job a couple weeks ago. i've been checking the oil and coolant regularly. no pudding in the valve cover. she does get a bit warm, but just a touch over 210. i think that's just air in the cooling system, though. any thoughts? Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted April 21, 2007 Report Share Posted April 21, 2007 The hesitation could be the IAC. I had one go out that way. It would still idle, not great by any means, but the conditions you described caused major hesitation. What was the code it was throwing? I know you said 94, so its not real easy to get the code, but maybe you went and got it scanned. Quote Link to comment Share on other sites More sharing options...
stockgp Posted April 22, 2007 Author Report Share Posted April 22, 2007 i don't know what code it was. i usually don't get off work in time to make it to a dealer or mechanic to get it scanned. Quote Link to comment Share on other sites More sharing options...
stockgp Posted April 22, 2007 Author Report Share Posted April 22, 2007 update: installed a new tps and iac. that helped, until the first time i shut off my car and restarted it. only other thing i can think of is a bad injector? Quote Link to comment Share on other sites More sharing options...
GP1138 Posted April 22, 2007 Report Share Posted April 22, 2007 Could be the coils and/or ICM. Get a set from the junkyard or just get one and put it in the place of each of your coilpacks in succession until the hesitation stops. Quote Link to comment Share on other sites More sharing options...
stockgp Posted April 22, 2007 Author Report Share Posted April 22, 2007 yeah, yeah. i've also noticed a bit of hesitation at pretty much any other rpm. if i let off the gas for a second, then get back in it, it hesitates. sound like it could be ignition proglem? Quote Link to comment Share on other sites More sharing options...
GP1138 Posted April 22, 2007 Report Share Posted April 22, 2007 I think so. Also consider that I did the same job, and routed the crank sensor wire across the rear exhaust manifolds, causing the wire insulation to melt and the wires to short out, causing my car to fall flat on it's face whenever it felt like it. Make sure you're not having the same problems. Quote Link to comment Share on other sites More sharing options...
stockgp Posted April 23, 2007 Author Report Share Posted April 23, 2007 i didn't even unhook the crank sensor... Quote Link to comment Share on other sites More sharing options...
GP1138 Posted April 23, 2007 Report Share Posted April 23, 2007 i didn't even unhook the crank sensor... From the ICM/Coils? There's a two-wire harness that goes straight down from the ICM/Coils to the crank sensor. Quote Link to comment Share on other sites More sharing options...
stockgp Posted April 23, 2007 Author Report Share Posted April 23, 2007 didn't unhook any of that. just set it all aside. i did, however, pinch the injector harness where it runs under the uim. that at least gives me a place to start. i swapped my mom's lumi icm and coils over to my car and it's running now. guess we'll see what happens Quote Link to comment Share on other sites More sharing options...
stockgp Posted April 23, 2007 Author Report Share Posted April 23, 2007 found it. icm and coils are fine. i was pissing around with the icm after the lumi icm didn't help the idle and bumped the vac line on the map sensor. wouldn't you know, idle smoothed right out. thank god for dumb luck Quote Link to comment Share on other sites More sharing options...
GIANT MOTH Posted May 10, 2007 Report Share Posted May 10, 2007 hey I went through this same situation and replaced the IAC. That fixed the overall stalling but the needle still jumps slightly on idle. There are ground issues with my circuit but you left off with bumping the map vac line? Was this the line that was the problem or the sensor? I'm thinking about throwing out some cash for a MAP. That should just about cover every single part in this piece of crap. Quote Link to comment Share on other sites More sharing options...
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