Topic: mpfi swap problem (Read 12950 times)

t_cel_t · « **on:** April 12, 2010, 01:56:11 AM »

so i just did a mpfi swap on the civic, got it to start but it backfires through the intake like crazy any time you open the throttle.
throws code 9, cylinder position sensor.
starts right up, idles fine, and i can rev it slowly through the backfires all the way to redline.
dizzy position doesnt change it at all, swapped the 2 blue wires on the dizzy but didnt change anything either.

also, i was told this intake was an a6, but the injectors are high impedence. i got some injector clips off an integra that fit that injectors that are in this manifold.

also i already swapped out for a known good igniter.(had a code 15 befor but ended up not having the plugs pushed all the way in)

more keeley

ApexSilver06MR · « **Reply #1 on:** April 12, 2010, 02:15:00 AM »

Timing is off.

ApexSilver06MR · « **Reply #2 on:** April 12, 2010, 02:15:57 AM »

Find youself some peak hold injectors. I got some if you need some.

ApexSilver06MR · « **Reply #3 on:** April 12, 2010, 02:18:49 AM »

Also don't forget to take a volt meter to the injectorator jets. Sometimes the ball and seat jam up. Double check the metering blocks as well and make sure you adjust the floats in the injectorator correctly.

HiProfile · « **Reply #4 on:** April 12, 2010, 03:48:50 AM »

Fucking Jay, you know those injectorators are bulletproof on 88-91's. It's just their hollow float design that sucks for boost, and he's not turbo yet.

Assuming timing is correct...(common retard "but it looked okay" prob) Sounds like a bad dizzy to me, although code 4/crank pos sensor is a more common problem. That's the one that forces limp mode. It could also be a bad ecu. If you swapped the wires for it and nothing changed, either the sensor (whole dizzy) isnt' sending a signal or the ecu isn't precieving the signal.

I doubt it's a wiring prob since the other sensor is far mroe sensitive.

I dated a girl in HS with boobs like that, even better she was blonde. Then I fucked myself by making out with her friend.

t_cel_t · « **Reply #5 on:** April 12, 2010, 04:36:25 AM »

Quote from: ApexSilver06MR on April 12, 2010, 02:15:00 AM

Timing is off.

cant be, it does the same thing whether its all the way forward or all the way back.
that dizzy did come off a running car right jay?

Quote from: HiProfile on April 12, 2010, 03:48:50 AM

Assuming timing is correct...(common retard "but it looked okay" prob) Sounds like a bad dizzy to me, although code 4/crank pos sensor is a more common problem. That's the one that forces limp mode. It could also be a bad ecu. If you swapped the wires for it and nothing changed, either the sensor (whole dizzy) isnt' sending a signal or the ecu isn't precieving the signal.

i guess the dizzy position not affecting it may be due to that fact the cps is bad?

i will try to find someone here in town with a stock pm6 that i can stick in there to rule out the ecu.

ApexSilver06MR · « **Reply #6 on:** April 12, 2010, 10:08:41 AM »

That distributor came right off of my a6 that I just smogged with. Maybe you mixed up the 2 cyp wires?

ApexSilver06MR · « **Reply #7 on:** April 12, 2010, 10:13:28 AM »

Go back thru injector wiring as well. Did you reverse the tps wires like you're supposed to.

Pm me phone numberz

malichite · « **Reply #8 on:** April 12, 2010, 10:33:11 AM »

Timing niggle

ApexSilver06MR · « **Reply #9 on:** April 12, 2010, 10:40:37 AM »

i know 100% that distributor and the internals are fine.

i would triple check the wiring for the conversion. also check to make sure all of the pins are all the way in at the ecu

t_cel_t · « **Reply #10 on:** April 13, 2010, 04:22:14 AM »

checked the resistance on the cps in the dizzy, and at the wires to the ecu-both check out fine. i must have pulled a buk and bought another junk ecu.

ApexSilver06MR · « **Reply #11 on:** April 13, 2010, 04:14:08 PM »

i have a known good on off of the same car.

remember, I just bought this crx, drove it home, smogged it, and then converted to obd1 and boosted. no cels.

chris · « **Reply #12 on:** April 13, 2010, 04:19:04 PM »

junk ecu=about 1 in 10000 chance.

t_cel_t · « **Reply #13 on:** April 13, 2010, 08:53:02 PM »

i swapped the injectorator wires to every possible combination, only gets worse when i did that.
car idles perfect, starts perfect but backfires through intake when revved fast.
new plugs were soaked in gas and totally covered in soot. only thing left is these injectors, im pretty sure the intake manifold is off an A6 but the injectors are high impedance, A6 should be low imp.

what are these?

chris · « **Reply #14 on:** April 13, 2010, 08:57:54 PM »

show where they plug in FOOL

t_cel_t · « **Reply #15 on:** April 13, 2010, 09:03:25 PM »

[milhouse voice]
yes sir

t_cel_t · « **Reply #16 on:** April 13, 2010, 09:08:20 PM »

malichite · « **Reply #17 on:** April 13, 2010, 09:10:33 PM »

Wait wait wait, have you actually solved the code 9 issue yet? If you havn't, fuck the injectors and get back to tracing wires and checking your timing again and again and again until you get that fixed. Once code 9 is fixed, then troubleshoot the other shit.

t_cel_t · « **Reply #18 on:** April 13, 2010, 09:12:44 PM »

the code 9 is no more

malichite · « **Reply #19 on:** April 13, 2010, 09:14:55 PM »

Ok, so at this point no cel at all, carry on. By the way, sorry, I dont know what those injectors are off the top of my head. Sure somebody will chime in.

t_cel_t · « **Reply #20 on:** April 13, 2010, 09:17:05 PM »

correct no cels

ApexSilver06MR · « **Reply #21 on:** April 14, 2010, 04:50:15 AM »

did you switch the tps wires? swap the outers?

900s · « **Reply #22 on:** April 14, 2010, 01:26:35 PM »

I yanked one of the injectors off my spare D15B7 mani and they look exactly like the ones you posted. Same markings, same plug, even the number is almost the same (4106 on mine though).

What's with selling A6 manifolds with the wrong gen injectorators...When I got mine it ended up having OBD2 injectors on it

t_cel_t · « **Reply #23 on:** April 14, 2010, 03:55:25 PM »

Quote from: ApexSilver06MR on April 14, 2010, 04:50:15 AM

did you switch the tps wires? swap the outers?

yes they are swapped, i will try switching them back tonight but im positive they are right.

Quote from: 900s on April 14, 2010, 01:26:35 PM

I yanked one of the injectors off my spare D15B7 mani and they look exactly like the ones you posted. Same markings, same plug, even the number is almost the same (4106 on mine though).

What's with selling A6 manifolds with the wrong gen injectorators...When I got mine it ended up having OBD2 injectors on it

well with the ones in this manifold being high impedence i dont fucking get it. it should run right with hi imp injectorators, right? either that or they test high imp because their fucked up.

900s · « **Reply #24 on:** April 14, 2010, 04:03:26 PM »

Quote from: t_cel_t on April 14, 2010, 03:55:25 PM

Quote from: ApexSilver06MR on April 14, 2010, 04:50:15 AM
did you switch the tps wires? swap the outers?
yes they are swapped, i will try switching them back tonight but im positive they are right.

Quote from: 900s on April 14, 2010, 01:26:35 PM
I yanked one of the injectors off my spare D15B7 mani and they look exactly like the ones you posted. Same markings, same plug, even the number is almost the same (4106 on mine though).

What's with selling A6 manifolds with the wrong gen injectorators...When I got mine it ended up having OBD2 injectors on it

well with the ones in this manifold being high impedence i dont fucking get it. it should run right with hi imp injectorators, right? either that or they test high imp because their fucked up.

Dumb question, but since I didn't see it asked already- you didn't wire in a resistor box, right?

Maybe just try it with some OBD0 injectors and a resistor box

t_cel_t · « **Reply #25 on:** April 14, 2010, 04:13:10 PM »

no as i was wireing up the resistor box i decided to check the resistance of the injectors and the found out they were high.
i will try to get some obd0 injectors but all the yards around here want 20+ per injector

ApexSilver06MR · « **Reply #26 on:** April 14, 2010, 04:20:27 PM »

put them in your pocket or take the resistor box out

t_cel_t · « **Reply #27 on:** April 14, 2010, 05:15:55 PM »

Quote from: ApexSilver06MR on April 14, 2010, 04:20:27 PM

put them in your pocket or take the resistor box out

did not wire in the resistors

anyway it runs perfect now, i knew it was going to be something totally fucking stupid and it was.

so im fucking leaning over the car unplugging the tps while its running (to swap the pins, ended up being right in the first place) and i get shocked by one of the plug wires.

these are brand new wires that i got off a guy on craigslist. the number 2 wire has a burn hole through it right where the little plastic clip it that holds all 4 wires apart and it was jumping to that little support bracket on the valve cover. anyway swapped out the wire for an old one and it fucking runs perfect.

thanks for your help

now all it need is some boost.

ApexSilver06MR · « **Reply #28 on:** April 14, 2010, 05:37:07 PM »

i got a turbo kit for you. lol

900s · « **Reply #29 on:** April 14, 2010, 05:45:35 PM »

Good shit, glad to hear you got it workin :yes:

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Author Topic: mpfi swap problem (Read 12950 times)

chris

chris