Petrol In The Catch Can?

[GunMetalR33]

update:

I changed the spark plugs on the weekend and guess what. The olf ones were black as night... Heaps of carbon on them. The problems is that it is still flat spotting at .8mm spark plug gap.

I will get the car on the dyno this weekend if I can and see if it running rich. Besides the AF ratio's what else should I be looking for on the dyno??? temp corrections etc????

Ps, ECU is a PFC Pro

[GunMetalR33]

Got the car booked in on the dyno on friday, is there anything other than the good old fuel ratio's to lookout for that could be causing it to run rich at certain points when on the road?

Anything else to lookout for that could be causing the flat spotting. I have new plugs, new coils so far...

Edited September 18, 2006 by GunMetalR33

[GunMetalR33]

SK,

Some questions on one and two?

1)How can I test the acceleration enrichment and partial throttle openings?

2)Where are the acceleration enrichment settings and Cold and hot start settings in the PFC HC.

Sorry to bug everyone, but I can just see me leaving the dyno place with the AF ratios looking fine and me having no real progress on this issue...

1. That’s a full power, WOT test. So it is 99% irrelevant, how much of the time do you drive around at WOT? . More importantly, what are the A/F ratios as partial throttle openings? At idle? What are the acceleration enrichment settings? Cold and hot start settings?

2. Together with the fuel in the catch can, it is the black smoke on start up that has me concerned. Give it a run on the dyno, but make sure you test idle, cruise, acceleration enrichment, partial throttle openings etc.

3. I would also have a good look at the fuel pressures, just to be sure that increasing fuel pressure is not the problem.

4. If that doesn’t show up anything then I would have the injectors flow tested. If one is rich for some reason, then the other 5 might be lean, giving 12 to 1 on average.

cheers

[GunMetalR33]

UPDATE:

I got the car on the dyno the other day and the AF ratios were all over the place. Thing was though they were not consistantly all over the place. We could not get it to follow a consistant path on the map tracer???

After a lot of dicking around we decided to check the the Air Meter Voltage and guess what? The volts were all over the place, which lead me to beleive that the AFM was shot.

It turn out that the plug was loose and once we snaged a zip tie around it she was puring like a kitten without any flat spotting

Now I just have to wait and see if any more fuel turns up in the catch can, if it does then those injectors are going to have to come and and get tested. :{

Edited September 25, 2006 by GunMetalR33

[GunMetalR33]

Been giving it a good run over the last couple of days and it seems that it is flat spotting at the top of 2nd gear, but not all the time???

Is there a way to tune the accelleration enrichment on the road without a lamda sensor?

Edited September 26, 2006 by GunMetalR33