B6T boo boo!!!

[fastivaB6TG25MR]

how/why are you running a rx7 vaf on a b6t ecu?

[KB Motors]

how/why are you running a rx7 vaf on a b6t ecu?

how-it bolts right up and plugs in, other people have run them before my buddy had one laying around so i fugured why not give it a shot.

why-because i thought my vaf might be bad on my car because it started running like poo all of a sudden

[KB Motors]

cant find my boost leak tester, gonna go get the stuff to make one tonight,

did a compression test last night 150psi across all the cylinders.

hopefully i will get it figured out this weekend, i get paid tomorrow so i might go buy an xr2 for parts

[fastivaB6TG25MR]

but the capri B6t vaf and the rx7 VAF run at completely different voltages. capri is 2.5-7.8volts and the RX7 is 0-5volts...both are 3" though. thats why no one can run an APEXi VAFC on a B6T


people run RX7 VAF's on BP's and B6's cause they are bigger than the OE VAF's and run the same voltages.

[M3NTAL]

We might have a Winner Winner Chicken Dinner here ^

[KB Motors]

We might have a Winner Winner Chicken Dinner here ^

i am not running an rx7 vaf on my car, the stock b6t one is on the car, i simply plugged in the rx7 vaf to see if the car would run any different and test to see if i possibly have something wrong with my vaf

[KB Motors]

i been kinda slow to getting around to it,BUT i finally built my boost leak tester and used it on my car, found 3 leaks 2 going into my intercooler, just needed to adjust the t bolt clamps a bit and the 3rd was a very small hole around one of the bungs welded on, i fixed that at work today

i also bought a oem, cap and rotor and oem spark plugs, i put those on and checked my timing its sitting right where it needs to be. and my car still runs like a turd!!!!

im still thinking i have a bad ecu, i talked to a local gtx fan and he has a spare ecu and dist. that he is gonna loan me hopefully this weekend

[Rocketman]

but the capri B6t vaf and the rx7 VAF run at completely different voltages. capri is 2.5-7.8volts and the RX7 is 0-5volts...both are 3" though. thats why no one can run an APEXi VAFC on a B6T


people run RX7 VAF's on BP's and B6's cause they are bigger than the OE VAF's and run the same voltages.

Thank you! This is very important info that somehow keeps getting clogged up in the internet pipes somewhere. Came in here to say this. The RX7 and XR2 VAF's are the same size internally IIRC, so there's no point in swapping them anyway.

Also, boost & vacuum leaks are very suspect, the B6T management is super finicky about it. Your symptoms point to a boost/vac leak somewhere. If you are running a BOV make sure it is closing properly. I've also seen some people with bad/reused intake & throttlebody gaskets that have caused problems, same with fuel injector seals. Check those, a propane or other fluid test might help.

Also, try unplugging the TPS and see how it acts. This will throw it into a safe-mode, but is not an indicator of a failed TPS if it runs good with it unplugged.

Trying a spare ECU would not hurt either, but they generally don't fail in the manner your car is acting

Hope you get it figured out.
-Rocket

[fastivaca]

What year RX-7 would be a good donor for the VAF?

[KB Motors]

Thank you! This is very important info that somehow keeps getting clogged up in the internet pipes somewhere. Came in here to say this. The RX7 and XR2 VAF's are the same size internally IIRC, so there's no point in swapping them anyway.

Also, boost & vacuum leaks are very suspect, the B6T management is super finicky about it. Your symptoms point to a boost/vac leak somewhere. If you are running a BOV make sure it is closing properly. I've also seen some people with bad/reused intake & throttlebody gaskets that have caused problems, same with fuel injector seals. Check those, a propane or other fluid test might help.

Also, try unplugging the TPS and see how it acts. This will throw it into a safe-mode, but is not an indicator of a failed TPS if it runs good with it unplugged.

Trying a spare ECU would not hurt either, but they generally don't fail in the manner your car is acting

Hope you get it figured out.
-Rocket

What year RX-7 would be a good donor for the VAF?

Thanks for the info rocket, i have unplugged the tps and it changes nothing, ill keep checking for boost leaks. i hope i figure this out too

and fastivaca, 2nd gen rx7 is what your looking for if you wanna put on on your bp car