Good point. I drove the car yesterday and it didnt do anything. I am really hoping its just a bad tank of gas lol. Ever since I replaced the coolant temp sensor back in May when it started, it didnt do it since.

 

we will trouble shoot this more after you do the bigger injectors soon here.

 

Sounds good tom! I just got the decals today. I may end up paying you for like one decent size rear windshield banner or something. Nothing huge though.

Im hoping to get the injectors this week. Pm me or email me what the cost of the 2150s are again with the plug and play adapter plugs.

 

so what was the conclusion on this? i'm having the same problem.

 

I remember replacing the coolant temp sensor and I never had any issue again with this. Sounds funny, but its what worked.

 

I just had a very similar problem and it ended up being the E85 goo build up on my 2150's.

 

I'm currently going through this with my car. Most frustrating issue I've ever had. Most of the time the car is fine with on occasional noticeable buck/jerk and really rich AFR (like 10.0) condition while cruising. But twice it has been completely undriveable. Misfiring constantly. AFRs between 10-12 pretty much at idle. Once it wouldn't fire up at all, like OP said. After 15 minutes in parking lot, it fixed itself and I drove home.

Will update with what fixes it for me, if I ever find it. Car has a new crank position sensor so that's probably not it.

 

Have you tried replacing front O2 sensor?

 

Have you replaced the coolant temp sensor like you said you were in the pm yet?

 

Front o2 sensor was recently found to be dead and replaced. Didn't help.

I will replace coolant temp sensor but last time it was so bad it was practically undriveable, I happened to be logging coolant temp with EvoScan and it didn't do anything weird. Steady 190-200 or so. No jumps.

 

Yea, I remember you saying that.

Hopefully you can get it figured out, nothing more frustrating than something you cant find the fix for. lol

 

Not to bring the thread back from the dead but was this issue ever resolved and if so what was it?

 

I had the same symptoms when running a cop. When I would take the cop out and run the stock coils and wires the car would run perfectly. I double and triple checked the cop wiring and I couldn't find any bad connections so I determined it was a bad coil. Bought two new coils and narrowed it down to one that was bad.

 

I am between map sensor or fuel pump is the issue but not 100% sure. Best part is omnipower said they will test it and replace it for free if it is bad. So I am going to buy the fuel pump and hope that's it first.

 

If you haven't already you might as well test the coils to male sure they aren't the culprit. The symptoms discussed on this thread are indicative of a bad coil...among other things