b6-b6t-bp air flow meter interchangeability..

[jitb37]

I wanted to know if a sohc b6 afm would work on a b6t? Or even the bp?

[Ace]

I believe it will, but you'll have to tune it. search for rx7 vaf tuning and its the same process. you want to measure the o2 voltage, it should be between .45-.78 at idle.

[jitb37]

The b6 one has to be tuned? Or th bp or both?

[Ace]

Pop the cover off an compare them. do they look the same? and any of them do if they aren't on the engine they came with.

[jitb37]

Well I don't have the car or the afm, I am in the process of tryi g to buy one. And the owner believes the afm is bad. Because its misfiring when in gear. I was just seeing if I need to track down a b6t one or use the b6. I am familiar with tuning them, if that's the case I may as well find a fc one. I'm gonna check the car out this week so ill know for sure.

But he said it misfires only with a load on it in gear. But doesn't at idle... could be a million things...lol

[Ace]

yeah. thats very true. I would see what you can get and work with it. if you can only get a b6 one then try it, but if you can get a b6t one then I would go with that one first.

[labeo]

But he said it misfires only with a load on it in gear. But doesn't at idle... could be a million things...lol

Yes, it's strange that there is problem at load, but idle is OK. IMHO this is ignition system problem or fuel, but not air flow section.
When my MAF (due to mechanical damage) hadn't possibility to move slightly, I've fixed it in "average" position (just to get home) - but there was problems as on idle, and as on gear. (I mean overrich mixture on the idle and on gear ).
When I've disassembled it - I've thought - it is eternal device! Only external/internal mechanical desctuction could cause error indication of sensor. Rheostat is well constructed (as for attrition of friction track) - so check it for correct resistance as it is written in workshop manual.
Good luck!

[jitb37]

The owner told me it idles@ 900. And revs to 3500 and starts to misfire backfirfe and stumble and won't rev unless mashed to the floor.

But in gear its useles.

He also said it started to do this after the first heat cycle of a headgasket replacement, and timing is perfect.

[Ace]

I would double check the timing. thats what It sounds like to me. And don't forget the ignition timing too.

[jitb37]

I would double check the timing. thats what It sounds like to me. And don't forget the ignition timing too.

yea it does remind me of what i went thru with my timing trying to set it on the bp, and it had to be perfect!

[BFMRGTX]

Could also be worn keyway.

[DeeAOne]

maybe one of the upcoming varsity meets ill bring mine up joe and we can test it. if you get the car that is. and you better! lol

[bg323v6]

uhh the b6t and b6 maf are different. as far as the misfire change the plugs and make sure there gapped properly and it should run fine. well mine did lol.

[psiturbo]

To me misfire is flow meter, at least when it has happened to me...

Bad disty whenever it has happened to me is inconsistent power band.

I would check that all sensors are connected or cables that the shield is bad and touching metal. I dont remember right now, but there is a sensor near the thermostat that is green color, well on the BP that when it is not connected does the same symptom.

By the way, check error codes, on Escort and Protes is 10 and ground and tell us the numbers...