Swift Cee

do the coil packs show up on the error codes? or are you suppoed to take an educated guess?

My 93 is coughin and spluttering a bit, and even conkin out on idle (I aint drivin it!!!!) MAF is showing on the codes, but the AA reckoned it could be the coil packs.

my money's on the MAF, any ideas?

cheers lads


swift

jaytc2003

iTrader: (1)

try disconnecting the maf, if it does the same chances are it is the maf, specially with it showing on the diagnostics. If it doesnt start or cuts out immediately with the maf disconnected then you could try cleaning the wires on the maf (the ones that the air flows through), if you do this though be very careful as not to damage the wires.

Swift Cee

thanks for the advice mate, my mate is coming round with a MAF, we're gona throw it in mine to see what happens. Im hoping its the MAF!!!!!

Cheers

swift

wisecobandit

My coil packs didnt show up as any fault code and all 4 looked dubious.
Mainly felt a slight hiccup when the boost was coming into play.Dunno if that helps you in anyway...

Swift Cee

its all helpful mate! trust me every bit of info is helpful. I took the coil packs out and they look fine , no cracks or anything, also my wrx didnt seem to do that, Im convinced its the MAF ill let you know.

thanks

swift

NotoriousREV

Coils usually fail under load i.e. weak spark gets blown out under WOT and on boost. Simply disconnecting the MAF will show if it's that as it will instantly run better (light throttle/tickover only)

vulnax999

iTrader: (7)

Even on Apexi, Rev ?? Does that compensate for failing MAF as OEM ecu's do ??

Tone Loc

iTrader: (1)

No it doesn't compensate, if you have a failing MAF with a Power FC it's very obvious.

Tony.

PhilA

"Simply disconnecting the MAF will show if it's that as it will instantly run better (light throttle/tickover only)"

So, when the car is idling/tickin over, if I diconnect my MAF and the car stalls then my MAF is broke???

NotoriousREV

I'm not sure stalling counts as running better...

tath

I think they mean if you disconnect it it should cut out instantly if you're MAF was ok, if it tries to run on it's dying.

vulnax999

iTrader: (7)

Thought so Tony, but how is it obvious tho' ... the sensor page on the hand commander or the voltage on the monitoring air flow screen?

PhilA

" I think they mean if you disconnect it it should cut out instantly if you're MAF was ok, if it tries to run on it's dying."

This is why I posted the stupid statement. From what I read it implied if I disconnect the MAF the car should
"run better (light throttle/tickover only)".

But mine stalls. AFAIK this means it is providing correct info for the engine to run and without it the car will not work so my MAF must be working at least.

tath

Yes

Tone Loc

iTrader: (1)

If you know the air flow values you normally run then these will reduce. I.e monitor air flow..... if it runs 4.5v peak @ WOT normally then starts only running 4.0V you know its not right. Plus by this time it will be detting its **** off... so your knock level in the monitor window will be very high and the CEL light will be flashing it's **** off. If you miss all that then buy some glasses

Tony.