20v turbo holding back

[pearlys2]

hi just found this site i have coupe 20v turbo with bad holding back problems wen tryin to accelerate hard or put foot down it just doesnt rev then pops throws out bit of black wreak anyone ever had this the engine is standard the now also wot fuse is it 2 clear the ecu and is there a diagnostic plug on this car thanx

[kwlw]

hi just found this site i have coupe 20v turbo with bad holding back problems wen tryin to accelerate hard or put foot down it just doesnt rev then pops throws out bit of black wreak anyone ever had this the engine is standard the now also wot fuse is it 2 clear the ecu and is there a diagnostic plug on this car thanx

Sounds for me like a boost leak . Try to search this forum for these two words.

Sau

[pearlys2]

i will check over all the boost hoses at weekend as i did have the intercooler off not that long ago but would it be as violent a missfire n jumping about as it is the full car jumping back and forth cheers

[S2sedan]

If you have a violent missfire like throw you thru the windshield, you have a boost leak or a MAF problem, that is called overboost protection, if you have a lighter missfire, could be ignition problem as well.

[Jamo]

Have you pressure tested the system?
Also buy the Mark H intercooler mod, more than likely you've got a leaky o ring by default.

[pearlys2]

am gona try the blink codes aswell to see if i can find anything anyone no a good way of testing the MAF is there set resistance through it or something to check it also how do i find out if i have a 3b or aby engine or where the codes are thanx

[4WheelDrifter]

s2central.net is your best bet.
HTH

[Honahon]

The guys are right in saying check these things first, MAF, boost leak (pressure test)
Other than that, my money is on coil pack if it's an ABY... (expensive!)

[pearlys2]

thanx for all info,an by pressure test do you mean the boost system all hoses involved in that what is the best way of testing this as i do not have a gauge in the car if it is the coil will it bring up a noticeable fault code chees

[pearlys2]

something else does anyone know what fuse i pull to reset the ecu of fault codes if i manage to get it fixed sooner than later thanx

[Jamo]

something else does anyone know what fuse i pull to reset the ecu of fault codes if i manage to get it fixed sooner than later thanx

Disconnect the battery, check www.s2central.net it's got all the relevant details regarding codes and reseting.

[martinjs]

something else does anyone know what fuse i pull to reset the ecu of fault codes if i manage to get it fixed sooner than later thanx

Pull the 2 fuses which are joined together with 'motor' marked on them for 2 mins.

[pearlys2]

had the car over for another diagnostic didnt really come up with much i didnt know,possible air flow meter but ive to try the coolant temp sensor and on back of the cylinder head at the master cylinder side theres a temp sensor there aswell is this the sensor just for the ecu its a white clip 2 wire,also under the inlet manifold my coolant temp sensor is brown with 4 wires on a 3b just makin sure as there is a sensor with two spades next to it thanx again

[audiman]

It sounds like the common boost leak problem, the temp sender will just give low boost on a 3b. You need to pressure test the intake system, search the forum for this. Loads of info on it. If the cut out is that violent then it "probably" isnt a misfire as such. Does the car feel very slow too? and heavy on fuel??

[pearlys2]

yeah the car is very sore on fuel puffing out black smoke bit sometimes and sooty exhaust very slow there wouldnt be much point in a boost gauge the now to see wot sort of reading i am getting would there