ok... i bought some svo 42lb injectors for my car. had them put in the car and had the car tuned for the injectors like your supposed to... the car just kept on missing and missing. so i changed all plugs and wires... still missing. took to a buddy of mine and let him play with the computer and throw some different tunes at it to see how it acted(thinking that the tune was bad) still multiple missfire and the car just runs like ****. so he's telling me that my used injectors that i bought had to be bad/broken/not working properly...

i got him to put the stock injectors back in.. along with the previous tune that i had in the car that i knew ran perfect.... still showing multiple missfire!!!


WHAT IS THE PROBLEM HERE!! anyone have any ideas whats going on?


all help appreciated,
Daniel

 

Ttt....

 

did you start or drive the car at all prior to getting it tuned?

 

no... i drove it to the shop, put the injectors in, flashed the pcm with the new tune, then cranked it

 

I would check the injector wires w/ a noid light to be sure that they are firing, and the next step is a compression test.

 

already did that... and everything came out OK

 

this is mind boggling...

 

check your coolant sensor on the head......it is causing my car bad surging issues right now and is dumping fuel! Go into what ever tuner you use and check the temp readings and if it reads like -49 or some weird number it is bad

 

ok i'll try that

 

if thats the cause its will be about 30-40 bucks to replace the pigtail and the sensor...... go ahead and do both just to save you the hassle

 

ok i will try that

 

that sensor is working fine.

 

hmmm, check your injector wiring that could cause misfires if they arent seated properly i believe

 

ok will do

 

Old thread, but what happened???