Miss-fire

Ronin · #1 30-06-2006, 09:48

On idle I have an intermittent miss-fire on no.1 cylinder, fuel consumption is also on the high side. I think this is due to injector not working properly, maybe not squirting everytime is there some way of checking this or does anyone have any other ideas as to what it could be?

PukkaSilvia · #2 02-07-2006, 09:52

Melted spark plug or faulty ht lead or dizzy cap/rotor arm maybe. Have you done a compression test.

Ronin · #3 03-07-2006, 15:33

Plugs, dizzy cap, rotor arm, HT leads and coil are all new. Compression is good last time I had it dyno'd it had this problem and produced 96bhp at the wheels with around 6psi boost. It only misses occasionaly at idle and the co value fluctuates also at idle, it dose this with 2 different air flow meters on it's not the air flow meter. I think this is something I am going to have to live with as everyone I've asked and who has looked at the car are baffled.

Ronin · #4 11-07-2006, 11:17

Today when I went to work it was the first time in a long time I've had to use my lights for a while and I noticed that the idle got worse with them on turned them off it went back to what it was before. Could the alternator be on it's way out? I know it not the battery as I replaced that not long ago.

s13eater · #5 11-07-2006, 14:12

IAA unit,that compensates for the lights and other electrical parts, this is on the front of the plenum, its where you alter the tickover.

Ronin · #6 11-07-2006, 15:26

What does it look like? Is it a relay or something like that?

s13eater · #7 11-07-2006, 15:41

you can't miss it,its got a pipe on it that has a rubber hose that goes to the original turbo to inlet pipe, it has 2 screws in it and a electrical connection,it also has the cold start onto it.

Ronin · #8 11-07-2006, 16:19

Is this it? If so what do I want to be looking for/doing?

s13eater · #9 11-07-2006, 18:50

yep thats it mate, you need to try another unit, don't ring nissan for a price as you may pass out

they are £300 +vat

well thats what i was once quoted, i'am not saying that is the prob for deffinate, but that is the idle speed compensator for the electrics.

Ronin · #10 11-07-2006, 19:01

There's more chance of something coming from mars than finding a secondhand one or one in a breakers. I think the DET conversion I keep thinking about will have to become more than thought as I can get hold of a DET with the turbo, ecu, loom and ancilleries for £300, all be it the bigends will need doing but I'd do them on a DET anyway, from a local breakers.