serious mis fire problems HELP please

gedis

Member +
exhaust is fine and clear, no blockages, going to take of the actuator arm, and try different fuel pressure regulator today if i get the time
 

gedis

Member +
changed fpr, blew thru fuel line's and no blockages found, checked belt timing, ignition timing, cam timing, took actuator off, wastegate and actuator working perfect,changed another map sensor(3rd one) done pressure test
1: 148psi
2: 158psi
3: 156psi
4: 160psi
also checked for wiring under the bonnet, the only thing wrong i found was were the aircon wire's plug was, wire's cut and left hanging, so just taped them up and tidied
and its still miss firing mad
 

tiksie

Member +
I've had a similar issue in the past with a bad pump filter (the filter that's actually on the fuel pump before it sends it to your rail).
 
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gedis

Member +
have you changed the pump yet?
I'm at it as we speak, also had a fidle with injectors, went thru every wire under dash both sides driver and passenger, behind the radio, behind clock's, and around ignition
behind clock's was few wire's cut and joint, charge light wire's cut up and connected onto engine management light,abs and oil pressure bulbs were removed, refitted back oil pressure bulb, left out abs one, after that charge light and boost lights wont work, i presume that was the reason to wire them to the engine management light,
found strange wire with 25 amp inline fuse connected onto ignition so i followed that up and its going to the pump white wire of the pump cut off and connected to that instead, also blue wire cut off the pump and earthed under the seat, going connecting them properly now
 

5e colin

Member +
did u do a check on the headgasket ???????? that will be ur misfire i think

but that is not the couse of ur boost isseu !!!
 

gedis

Member +
did u do a check on the headgasket ???????? that will be ur misfire i think

but that is not the couse of ur boost isseu !!!

done compression test, results one page above, cyl no 1 is down a bit but not that bad to miss fire, also overall results aren't too bad for car with 224k on the clock
 

weeJohn

Lifer
A lot of those dash lights come from the ecu, might be worth trying another one in there as fuck knows what shorts in the electronics that wiring balls has caused.

On a side note, whoever has been working at that car before you should be kicked square in the ballicks, then asked if they think they didnt deserve that.
 

tiksie

Member +
done compression test, results one page above, cyl no 1 is down a bit but not that bad to miss fire, also overall results aren't too bad for car with 224k on the clock

Compression test or leakdown test ? A compression test only shows so much.

I've seen good comp tests before then terrible results from a leakdown test.

How much vacuum are you getting at idle ?

The only thing that makes me think that the turbo will load in park is extremely retarded timing which would be loading it up enough in park to spool the turbo but you said you already checked that so it should be fine. I'm guessing you're getting 15 degrees of ignition timing at idle ?

Oh, another thing that causes turbo's to spool in park is the TPS, if it's extremely out of whack, the rev's will climb up slow like when your timing is really off. Does it rev fine ? dac mentioned it on page one too, did you end up checking it out or swapping it over with a known working one ?

I'm not familiar with Glanza's, do they have adjustable TPS switches ? As in a varying voltage depending on throttle plate position ? I know that some came out with the varying one and most came out with the on/off type.
 
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gedis

Member +
A lot of those dash lights come from the ecu, might be worth trying another one in there as fuck knows what shorts in the electronics that wiring balls has caused.

On a side note, whoever has been working at that car before you should be kicked square in the ballicks, then asked if they think they didnt deserve that.
i did tried another ecu and still no good I'll try third one tomorrow, i put the wide band on her and she's running very lean afr 17-18, only thing i didn't changed is injectors, really getting pissed off with the thing now
 

gedis

Member +
Compression test or leakdown test ? A compression test only shows so much.

I've seen good comp tests before then terrible results from a leakdown test.

How much vacuum are you getting at idle ?

The only thing that makes me think that the turbo will load in park is extremely retarded timing which would be loading it up enough in park to spool the turbo but you said you already checked that so it should be fine. I'm guessing you're getting 15 degrees of ignition timing at idle ?

Oh, another thing that causes turbo's to spool in park is the TPS, if it's extremely out of whack, the rev's will climb up slow like when your timing is really off. Does it rev fine ? dac mentioned it on page one too, did you end up checking it out or swapping it over with a known working one ?

I'm not familiar with Glanza's, do they have adjustable TPS switches ? As in a varying voltage depending on throttle plate position ? I know that some came out with the varying one and most came out with the on/off type.

tps isn't variable on her, its a on /off switch, ignition timing is set to 10 degrees as it should be, I'll check vacuum on her tomorrow
 

weeJohn

Lifer
i did tried another ecu and still no good I'll try third one tomorrow, i put the wide band on her and she's running very lean afr 17-18, only thing i didn't changed is injectors, really getting pissed off with the thing now

Things that affect the fuelling that has not been mentioned, water temp sensor, to a small degree the air temp sensor, fuel pressure regulator.
 

GP82

Member +
There is a filter in between the intake manifold and map sensor, jus' check it's not dirty or the vacuum pipe is not blocked with dirt and also the vacuum pipe itself is still intact. There is also the vaccum pipe off the intake to the fuel reg, check this is still intact. As weeJohn has said worth checking the water temp sensor, i have seen these play up before and cause symptoms you are having. Jus' read the thread and what a ball ache mate, good luck!
 

gedis

Member +
checked all the vacuum hoses, changed water temp and air temp sensors and still no good, its getting to the stage where nothing left to check, and the bastard still wont go
 

dac69er

Super Moderator
sounds like the wiring loom has been messed about with from what you have said so it may be a case of getting the fine toothed comb out and checking it all over for any other dodgy bits!

I would try running a new live and ground from the battery straight to the pump (with a fuse of course). an easy thing to try and would totally rule out the fuel pump or associated wiring.
 
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