BP mx troubles

mx3TT · Post by **mx3TT** » February 4th, 2005, 8:38 pm

A lot of people know my deal with the engine and my haunted mx-3 so I wont get into it. I put in a BP myself and getting everything going finally now that i have money. Had a lot of trouble starting and when it did run it ran extremely rich. We found the temp sensor for the ECU was busted so we replaced it and now it starts very nicely every time. But, when it gets about 2,500rpms or so, it will cut out becuase its getting way to much fuel. What do you guys think, fpr? air flow sensor?

Shady469 · Post by **Shady469** » February 5th, 2005, 1:13 am

do you have the vacuum line going from the manifold to that solenoid then to the fpr? If so try bypassing the solenoid. On my SOHC i had some serious issues where it would go until about 2500 then hickup and not rev any more and it turned out to be that solenoid. I'm assuming if your using a different VAF its adjusting properly (all the protege people say 4-5 teeth on the RX7 vaf but 3 is about right on mine: more and its way too rich)? What does the O2 sensor look like? I'll try to help troubleshoot as much as a can... just keep posting...good luck

mx3TT · Post by **mx3TT** » February 5th, 2005, 1:04 pm

Not sure if the hose is there. It should be but who knows. You have a pic of the solenoid and the hose? I am using a BP air flow sensor and i dont think it has ever been adjusted. The O2 sensor is brand new. It does sound exactly like what yours was doing though. Let me know if you have the pic.

Shady469 · Post by **Shady469** » February 5th, 2005, 5:25 pm

Originally the Vacuum line goes from the manifold-->Solenoid on right-->FPR. Now, as you can see I have it manifold-->FPR
I also got rid of the filter thing for the vics solenoid but that was because it was getting dark and i was in a hurry, but it's doing fine without it.

mx3TT · Post by **mx3TT** » February 5th, 2005, 6:38 pm

Thanks shady for helping out. I dont have the car here its with my brother so I will have him check into it. I will let you know what happens.

mx3TT · Post by **mx3TT** » February 7th, 2005, 6:39 pm

My brother will be checking everything out tomorrow. Anyone else have any ideas? Any help would be great.

MZein · Post by **MZein** » February 8th, 2005, 1:09 am

My MX-3, too, doesn't start up in cold weather.
I did a diagnostic code check and the code is "23".
Does anyone know if the codes SOHC and DOHC engines OBD1 are the same?
If not then can someone tell me what this code means for a '92 MX-3 1.6L SOHC engine?

Thanks in advance.

mx3TT · Post by **mx3TT** » February 8th, 2005, 5:58 pm

Dont jack my thread foo

Shady469 · Post by **Shady469** » February 8th, 2005, 8:50 pm

lol i already took care of it mx3TT... PM'ed them as not to "jack" this thread.
Has your brother looked at the mx yet?

mx3TT · Post by **mx3TT** » February 8th, 2005, 10:01 pm

Yeah but all they did is look at wires. They are going to try to swap out the harness and see whats up. He doesnt think its the FPR but heres a question. If i got a S-AFC could i lean it out by that even though its running bad for some unknown reason? Seems like it would.

mx3TT · Post by **mx3TT** » February 8th, 2005, 10:02 pm

By the way thanks for looking out

Shady469 · Post by **Shady469** » February 8th, 2005, 10:13 pm

before you spend your hard earned $ on a S-AFC: crack open the VAF and adjust the spring.
Same process: http://www.mazdaracer.clubprotege.com/RX7VAF.html
but yes: You can use the S-AFC to lean it out. The S-AFC is the only way i could get my old B6T to run with the bigger injectors...

MZein · Post by **MZein** » February 9th, 2005, 12:32 am

My appologies, my name is MZein not "foo".
I've posted it as a different topic.

torpedan · Post by **torpedan** » February 9th, 2005, 2:45 am

Another issue that can create that problem is a cracked intake boot. If you are still ysing stock intake componets. The Ripples crack and cause major probelms.

mx3TT · Post by **mx3TT** » February 9th, 2005, 5:31 pm

Yeah I know that. But would it make me run that rich where it will bog like that? He gets to look at it again thurs and fri so we will see what happens. I dont really know how much time they get to look at it each day but hopefully they will make more progress.

P.S. It was a joking around "foo"