AFM swap - what should I expect?

AFM swap - what should I expect?

Author
Discussion

FlipFlopGriff

Original Poster:

7,144 posts

247 months

Friday 31st July 2015
quotequote all
Right, finally checked my AFM. Initially when ignition on the reading jumps to 4 then quickly drops back to around 0.35 (after 5 seconds). Start it and the reading is 2.11 then drops to around 1.87 after a minute.
Swap AFM (another Griff AFM). initially higher around2 then drops to 035 after a few seconds. Start is up and 1.90 but stopped it after a few seconds as it didn't sound as smooth as the original meter.
Conclusion - no clue.
Car is a 430BV.
Am I just wasting my time and the original AFM is good?
FFG

FlipFlopGriff

Original Poster:

7,144 posts

247 months

Saturday 1st August 2015
quotequote all
RPM around 900 when warm. I wasn't in the car when tested so only at the revs it started at which are generally higher than 900, say 1100 before it warms up and drops back down.
I've got a new 5am (copy though) which i'll try.
Was planning on going 20am but along with some other mods at the same time but Mrs FFG out of work at the minute so this is on hold.
FFG

FlipFlopGriff

Original Poster:

7,144 posts

247 months

Sunday 2nd August 2015
quotequote all
CO trim was at 1.39-1.4. It does adjust up and down. The car stinks when I put it in the garage and it only passes the MoT if the throttle is blipped a few times to bring the idle figures down and then only just passes.
Steve, are you saying to adjust the CO trim to 0.35? The testing info I have states it should be between 0.8 and 1.4 so it is, just. What impact does lowering the CO trim have?
FFG

FlipFlopGriff

Original Poster:

7,144 posts

247 months

Sunday 2nd August 2015
quotequote all
Steve,
So 1.4 is the ideal?
What happens above 1.4?, say 1.6?
FFG

FlipFlopGriff

Original Poster:

7,144 posts

247 months

Monday 3rd August 2015
quotequote all
Thanks Steve. So if I set the CO trim to around 0.95 and see how it goes? I don't have Rovergauge but I need to. Got an ECU mate but no idea how to use it.
Do I just need the cable (from Mark on the bay now) and the software? and a laptop obviously. No idea what all the letters/numbers mean but presume if I get Rovergauge I can drop a screenshot on here.
FFG

FlipFlopGriff

Original Poster:

7,144 posts

247 months

Tuesday 4th August 2015
quotequote all
Podie said:
Agreed!

Seriously, FFG don't waste your time.
Bought a couple at the time a few years back and have one on the 500 - it runs like a dream!!
Maybe I should mothball mine and drive that instead.
FFG