Mustang hesitating?

[88blowngt]

I'm not sure if thats what it should be called. I've experienced hesitating and ignition breakup before and found out it was my pickup in the dizzy. Well since then I've installed a Pro Billet MSD dizzy, superconductor wires and a blaster coil. Everythings about the same age. As of yesterday, under light engine load I'm finding a little blip or what could be hesitation as I'm just driving normally. I don't experience the hesitation when cruising normally or at WOT but just every so often when traveling through the rpms in every gear like a normal driver. Any suggestions? Something lose possibly? Help me start a checklist. Thanks again fellas.

 

[jka]

It could be the tps sensor or it can be running rich at times or a bad 02 sensor or something as simple as cracked vacuum hose. Check the tps and vacuum lines and clean the throttle body and idle control valve.Check the plugs because you may have one that's bad because of the engine running rich and replace your fuel filter if you have not replaced it.

 

[88blowngt]

Fuel filter was replaced, will test the TPS and pull the O2 sensors and give em a once over. Anything else?

 

[jka]

Check your timing because i have an 89 GT and when i replaced my cam and i install the dizzy i just knew my timing was right. But when i drove it down the road it had power but it bucked and hesitated.But when i adjusted the dizzy just alittle bit it was perfect so you may have your timing set to advance so check that and keep me posted. Good luck.

 

[HISSIN50]

Pull codes first.

 

[Warbird19]

do you have a cold air? Might want to check and make sure there isnt crap on the MAF sensor wires. take it out and spray it with brake cleaner.

 

[impulse001]

I was having similar problems and turned out to be a bad vacuum hose leak...

 

[black94svt]

check to make sure all of your plugs are ok and make sure there screwed in all the way. i had a similar problem.

 

[88blowngt]

Its all good, turns out there is a small hole in the green wire of the TPS sensor and whenever it wiggles the voltage goes outta wack. Just gonna order a replacement and be done with it. Thanks for the checklist fellas!