idle surge

I have a 86 GT, 5spd. Engine is a 5.0(302) with gt40 heads and intake. e303 cam and shorty headers with catless xpipe. I am running microsquirt from efisource and an aem xseries wideband. Engine starts and runs great up to operating temp. I have an electric fan that's controlled by the ecu and...

I have a 91 mustang gt with a 93 motor in it with some work done to the motor from what I was told. They said it had a cam in it, 24 lb injectors, trickflow intake, 93 computer and bbk headers. There might be more but I'm not aware of but I sent it into a mechanic that had to use the 93 harness...

I've been having surging issues for a couple of months now. I replaced my IAC and checked for vacume leaks and tested my TPS. The surge is only slight. Maybe 25-50 rpm when its warm and on a real cold start it surges quite a bit for about a minute before smoothing out. I've done a reset and I've...

I have an 08 mustang GT that has been modified with a e force blower, thumper cams and of course an aftermarket tune. The problem is when I am coming to a stop light the idle will go down to around 200 rpms then rev itself up to around 1300 or so. This will repeat until it either stalls or...

Hi Guys, Hopefully together we can figure out an issue I'm having with my mustang. I've identified the culprit but don't know how to fix it. My mustang will idle up around 2k rpm when the engine is cold. It bounces back and forth for a couple minutes slowly coming down to around 1200 rpm. My...

I have been at this problem for months now and I can't seem to find a resolution so I'm hoping the more skilled people here can help before i start spending of money on having someone diagnose so here goes. I have seen several forums on my issue but everything i have tried doesn't seem to fix...

Hey guys, my 88 gt has been doing a ton of weird stuff lately. Its been inconsistenly surging for a while but it never inhibited me from driving the car but recently it started this new thing where every now and then after its been running for a while it will stall compeltely after seeming to...

(2001 v6 manual stock just a cold air intake)Recently I've had a problem with my idle. When it's stopped its fine and sits around 850 or so. In the past couple weeks it's been acting up really bad. When drive and In-between shifts the Rpms will jump to about 3500 Rpms and stay there and not drop...

Hey guys I'm in need of some serious help. I have an 88 Gt hatch with a fully built 306 and I'm having some major ignition issues. For some reason my car breaks up terribly after 2k. It use to do this at 5500 but now its gotten much worse. When it breaks up its pretty violent it shakes the car...