i have tried everything i can think of to try and fix the miss i have in my car. i sent my injectors off and had them cleaned, new coil packs, new spark plugs. when i rev up to approx 1500 rpms my engine starts popping. anyone have any ideas what this could be?

 

check the operation of the fuel rail pressure sensor with scan tool. i would say your pressure sensor is bad or your fuel pump, one of the 2.

 

i would do a compression test as well.

 

i have an svt focus full pump that just got here friday and have nt installed it yet. i also have my x-cal3 coming in this week and i can run that on it. do you guys have any other ideas?

 

I agree with what the other 2 guys said, check your fuel pressure you should be around 40-55 psi. Plus if your fuel pressure is fine go back over your spark plugs make sure they are gapped properly, and tight. I had a miss on 2 of my cyclinders I had weak fuel pressure replaced everything still had the problem, I even bought aftermarket ignition coils. Come to find out the new igition coils, 2 of them were bad from the get go. I was pissed. But good luck and keep us posted.

 

yea i have had the miss since i have owned the car. i think i got it now. i was re-doing my nitrous set up and in the process i un plugged the vacum line to the egr plugged it in and no miss so far. drive it around this week and see if it stays gone. i have the flow charts from sending my injectors off and they showed one of the injectors was 7% blocked and the others varried from 3-6%. so i have no idea if that could have been the original problem.

 

i vacuum leak would definitly cause drivablility problems, that was probably your problem.

 

Im glad you found that, so its a quick and easy fix. A vacuum leak will always lead to problems. At least u found the problem and now u can get on it.