99 gt cms stage 1 cams idle problem

[rispoli_23]

hey guys here is my issue i have a 99 stang gt and i just had cms stage 1 cams installed at first my car ran fine with a custom tune i got when i installed the cams and then a few days later the idle started to surge real bad when i would stop or put the clutch in and then it got to where it would just die everytime i stop at a light or push my brake hard while idleing so i took it back to the shop and they replaced the iac valve wich worked awesome for about 2 days and then the problems came back this time they say they cant find out whats wrong with it so i picked it up .... i did notice if i reset the computer or change my tunes the car will run fine for about a day and then the problems come back .... im so confused please help the only dtc code m tuner pulls is p0602 ... here are my mods

99 stang gt 5spd
cms stage 1 cams
c&l plenum
accufab 75 t/b
c&l cold air intake with c&l maf housing with stock sensor
0/r h pipe with flows
sct x3

please help
thanks
richard

 

[CobraRed_96_GT]

disconnect the battery after loading a tune and reconnect it after a few mins. If it keep doing it talk to the tune designer, shouldn't do that.

 

[rispoli_23]

thanks bro i tried that last night and so far so good this morning, but it usually takes a day of drivin before it acts up, and far as p0602 code sct said to have my tuner guy turn that code off, and they also said i probably need to have my car dyno tuned wich sucks because thats on of the reasons i went with the stage 1 cams , hell i dont know anything anymore lol, anymore suggestions would be great..... thanks again

 

[scupking]

Any time you do cams or go F/I you should get a dyno tune, if you don't you will run into problems.

 

[nyuk98gt]

rispoli_23:

The PCM is learning some idle and fueling adjustments over the course of a couple of days of driving. Obviously, it doesn't like the learned settings because they are too far away from a stable operating range. Sounds odd but I think that's the problem. Call your tuner and ask what he wants you to datalog for idle tweaking. It may take a few tunes e-mailed to you but he can get the problem sorted out. A dyno tune is great for the upper RPM range and you should do this before you head to the strip or go WOT frequently. Again, ask your tuner for his advice. First, get the idle sorted out and you'll enjoy the cams and your car a lot more.

HTH,

Chris

 

[Winters98GT]

get the car tuned by a real tuner with experience. Any problems that arise will be shorted out. I'd stay away from a mail order tune.

 

[rispoli_23]

thanks guys for all the help, i think i need to get it dyno tuned, i asked my tuner if he wanted me to datalog anything and he said no and after all the reseach i have done i found out that when you install cams to get a good tune you either have to put the car on the dyno or datalog some info for a mail order tune, i think my tuner guy is a beginer good thing i only paid 30 bucks for the tune, i do have one question tho as i was looking for any vac leaks i noticed that one of my coils was broke at the ring where the bolt goes to keep it tight so right now its not secure can this affect my car until i buy a new one

thanks
richard

 

[nyuk98gt]

rispoli_23:

I do not have experience with the COP hold down tabs. A search might help you find the answer. My opinion: the boot will stay "sucked onto" the plug but you should check it regularly (weekly) to ensure it has not been vibrated out of position. COP's are pricey but you should replace the broken one as soon as you can afford to do so (and you won't have to keep checking the boot!).

HTH,

Chris