EA81T Coughing and missing

jimmyb · Post by **jimmyb** » Wed Mar 07, 2007 6:06 pm

Well to recap, had dash light coming on, indicating the coolant sensor, replaced that, also replaced the dizzy cap and rotar, spark plugs and checked for vaccume leaks.

Its still doing it......almost sounds like its not firing when it does is, its under load and compression when it does it.

HELP!

SuBaRiNo · Post by **SuBaRiNo** » Wed Mar 07, 2007 6:13 pm

have u checked the fuel system??

Dave

jimmyb · Post by **jimmyb** » Wed Mar 07, 2007 6:18 pm

As in the fuel filter? NO not as yet.

SuBaRiNo · Post by **SuBaRiNo** » Wed Mar 07, 2007 6:27 pm

i would be checking the enitre fuel system myself... eg... old fuel lines possibly letting air in... fuel filters... fuel pump.

There has been a lot of times i have had unsually problems which turned into something simple.

Fuel filters are a big thing... can be fine one minute... totally blocked the next.... and this would effect a turbo motor more than a carb motor i would expect.

Dave

jimmyb · Post by **jimmyb** » Wed Mar 07, 2007 6:31 pm

Yeah will check that tomorrow, the ECS light still appears but not long enough now to get a code like when i had the coolant sensor prob.

Could bad leads be causing it also?

Post by **Alex** » Wed Mar 07, 2007 7:02 pm

definately check the leads and fuel filter....

a few months ago my car started missing, no power, running on 3 cylinders etc, so i replaced all the leads, problem solved. Then about two weeks ago, the car was coughing and backfiring, it would get to 3000rpm and just die and stall..replaced the fuel filter, and that problem was fixed...

alex

jimmyb · Post by **jimmyb** » Thu Mar 08, 2007 3:10 pm

OK Done fuel filter, replaced with smaller standard basis style, still has problem. hmmmm.

MY_STI · Post by **MY_STI** » Thu Mar 08, 2007 8:25 pm

Are you running a good coil? Have you increased the boost?
If you have replaced the leads, try reducing the spark plug gap a little.

Could also be injector related, maybe a bottle of fuel system cleaner, or take them out and get them cleaned.

Finally, I hate to say it but, give it a compression test.

Post by **Captain Obvious** » Thu Mar 08, 2007 8:42 pm

jimmy it could be and injector or the coil, i would check the fuel pump 2 i nver had the prob when i had ther car??

jimmyb · Post by **jimmyb** » Fri Mar 09, 2007 9:51 am

Well doing the leads today, checked the fuel pump when I did the fuel filter. Havnt incresed boost or anything like that. The problem was there before the plugs were replaced also.

If leads dont help, might look at coil next. It almost feels when it does it that its not firing.

jimmyb · Post by **jimmyb** » Fri Mar 09, 2007 11:12 am

Well put leads in, prob still there, less frequent but still there, bugger!

Jeff · Post by **Jeff** » Fri Mar 09, 2007 7:35 pm

You have changed the plugs? I had a similar problem about a month ago and thought i got some bad fuel so i changed filters etc and no difference i put a set of plugs in it and problem solved
Hope this helps

jimmyb · Post by **jimmyb** » Fri Mar 09, 2007 11:14 pm

What should the plugs be gapped at for best performance?

Jeff · Post by **Jeff** » Sat Mar 10, 2007 11:47 am

0.7 / 0.8 i think but i just used the spare set of irridiums i had for my WRX and never checked the gap as i beleive it is the same , anyway car runs fine

Post by **Captain Obvious** » Sat Mar 10, 2007 8:58 pm

my next attack would be the injectors jimmy i gave brad a heap of parts when he bought the car and there should have been some injectors in that stuff if you got it with the car, the injectors that are in there are one a had cleaned which would have been2 years ago??

i may have some injectors here will have a look

cheers
bryan

jimmyb · Post by **jimmyb** » Sun Mar 11, 2007 10:09 pm

Yeah got the stuff, dont think any injectors in it though, has been running fine for 2 days then jus went for run to get smokes and bam! did it again, bugger.

If you have some injectors, please let me know.