run on/turbo timer

Subafury · Post by **Subafury** » Sun Aug 19, 2007 9:40 pm

just recently - for about 2 weeks now - when my car turns off it runs on for a little bit and then pops a little backfire. it doesnt happen all the time but its strange to have suddenly started happening.
the only thing i can think of is that i tapped into an ignition wire off the turbo timer for my new thermo fan about the same time it started happening. but i dont really think this is the cause.

ea82T on PULP.
any ideas?
EDIT: btw i am going to get the car's microtech ecu tuned in the next couple of weeks, will they be able to fix it through this? because im guessing some sort of fuel mixture is wrong

AndrewT · Post by **AndrewT** » Sun Aug 19, 2007 9:53 pm

Try taking the thermo fan off that wire as a quick test.
Is the thermo drawing all it's power from there or did you use a relay?

Matatak · Post by **Matatak** » Sun Aug 19, 2007 9:59 pm

yer like andrew said disconnect the extra thermo
shuld only be needed for 4x4in onroad u shuld be fine with one

Subafury · Post by **Subafury** » Sun Aug 19, 2007 10:57 pm

AndrewT wrote:Try taking the thermo fan off that wire as a quick test.
Is the thermo drawing all it's power from there or did you use a relay?

oh yeh it does need a relay. i cant beleive i forgot to hook one up. reckon thats the cause then?

90brumby · Post by **90brumby** » Sun Aug 19, 2007 11:25 pm

if the thermo fan is still spinnin it can actually create some poweer n there for turn the igntion bak on

umm if ya hook a realy up it might fix it

i could b talkin crap n none of this will help ya but thats no differnt to ny other thread then

YouTube · Post by **El_Freddo** » Tue Aug 21, 2007 9:50 pm

It could be that your engine has now got a carbon build up and "diesel's" after the ignition is switched off. This also happens when the car is running hot. A change in the fuel mixtures if they are incorrect should get rid of this problem after a while. Try running some engine cleaner through the fuel and see if there's any difference.

But then again, being an MPFI Turbo it shouldn't be dieselling as there should be no fuel in the cylinders (injectors turn off when ignition is turned off, just like the spark i'd imagine...).

Cheers

Bennie

Matatak · Post by **Matatak** » Tue Aug 21, 2007 10:21 pm

yer ive never heard of it on a MPFI only carbies

hmm engine cleaner thru the fuel never heard fo that and doesnt sound good lol
how about some engine cleaner in the oil and some petrol system cleaner stuff in the fuel

YouTube · Post by **El_Freddo** » Tue Aug 21, 2007 10:30 pm

Matatak wrote:hmm engine cleaner thru the fuel never heard fo that and doesnt sound good lol
how about some engine cleaner in the oil and some petrol system cleaner stuff in the fuel

Yeah, i don't know what its called but i'd imagine that there is something out there that you add to your fuel to clean out carbon deposits in the cylinder...

Cheers

Bennie

Matatak · Post by **Matatak** » Tue Aug 21, 2007 10:55 pm

sounds more like octane booster type stuff

Subafury · Post by **Subafury** » Tue Aug 21, 2007 11:36 pm

thx for the input fellas but turns out it was the thermo without a relay causing the run on. problem solvered.