Bad stuttering/bucking/hesitating?
 

I have searched for two days and I am yet to find anybody that describes there symptom the same as I am experiencing.


Early this week I was noticing a slight "cut-out" of the engine. It was not at a certain RPM , but when I would accelerate a little quicker than usual. Like to merge on the expressway or something similar. Then yesterday it just shit the bed. The car was not drivable at all, it sort of reminded me of when my MOP went out and I had to "limp home", but the only code it is giving is the TPS, narrow and full range. So when I got it home I checked the resistance sweep and full closed and full open positions. All were in FSM specs and the sweep was unbroken and linear. The only thing I can think of, and I am going to pull them tomarrow, is that the Fuel injectors could be clogged. I mentioned that my MOP went out so every since I replaced it with a junkyard special I have been premixing 2 cycle oil in my fuel. Could cheap or too much oil in my fuel cause the injectors to clog? Any insight into what isgoing on would be great. Thank you in advance.

It sounds like your injectors are clogged. Thats almost exactly like my symptoms, and my injectors were aweful - two of them failed the spray pattern test. I dont think premixing would clog the injectors too much, but if they were already somewhat clogged it could amplify the problem. As far as cheap premix, as long as it is TCW-II certified, or whatever it is, its fine. I say pull your injectors and get them cleaned. Check out www.cruzinperformance.com - they flow test them so you can see how bad off they were, plus they do a good job. I think it was 55 shipped, or so.

I'd try replacing your fuel filter before you go through pulling the injectors and sending them somewhere.