R32 Hessitating Very Bad

[MYP16]

hey all just bought a 4 door 32 and i had coil packs tested, they were stuffed got new splitfire coil packs and irridium plugs and put them in and a new oxygen sensor also went in. and i still seem to have a rather bad misfire or hesitation while im driving the car on boost or not.it is running an auto mines ecu and car is manual and the plug on the cat convertor has been cut off in japan so the dash light flashes constantly can anyone help me please.

i have also checked afm

any help would be much appreiciated

MYP16

[rob82]

Check base timing, check fuel flow and pressure - at least 2.5l/min at 38 psi. Do a code check to make sure its not TPS and then I would be checking your AFM again.

[nemz]

also may sound stupid, check your oil level

where any vacuum hoses changed? i know i had problems when i used bigger hoses for my turbo's bleed valve and blow off set up, started causing a lil drama's

also take out those irridiums and get some ngk copper plugs, ull have less drama's

Edited December 7, 2005 by nemz

[Sydneykid]

hey all just bought a 4 door 32 and i had coil packs tested, they were stuffed got new splitfire coil packs and irridium plugs and put them in and a new oxygen sensor also went in. and i still seem to have a rather bad misfire or hesitation while im driving the car on boost or not.it is running an auto mines ecu and car is manual and the plug on the cat convertor has been cut off in japan so the dash light flashes constantly can anyone help me please.

i have also checked afm

any help would be much appreiciated

  MYP16

<{POST_SNAPBACK}>

My Suggestions;

1. What plug gap? Should be 0.8 mm, not 1.1 mm as they usually come.

2. Have you checked the ignition timing? Autos run more initial ignition advance than manuals, it may be necessary to set the timing at 20 degrees instead of 15 degrees. Try both and compare.

3. Have you had a leak down test done? Results?

4. I have never seen a Mines ECU work very well in Australia, get a hold of a standard ECU and compare. You could spend much time and money chasing other things when the ECU is the real problem.

5. Pull the bulb in the cat overheat warning light.

Hope that helps

cheers

[GTSR22]

also do you have aboost controller? that might be the problem.

we had a faulty one once and it was jerking on carrying around

cheers

[T04GTR]

un plug the 02 sensor. it sounds silly but it will eliminate it as a problem. evan if its new it could be the wrong one.

also if you can get hold of a fuel presure guage it would be handy.,tell the mechanic to test it while hes up it.

(be carful not to place it under the wipers as i broke a windscreen doing it that way)

does it have a foam type airfilter,or any aftermarket air filter?

from what it sounds like these are my main suspect parts:

1-air flow meter

2-fuel pump

3-02 sensor(will be ok when cold but f**k out after about 2-3 mins)

4-ignition igniter.-finned thing at the back of the motor

5-coolant temp sensor

if had to fix a whole heap of these problems with cars coming of the boat, and its usaly in that order.

[hanja~13~]

How do i test my AFM???

[nemz]

i reckon it would be your spark plugs, iridiums suck balls!