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-   -   Dissasembled upper manifold, Now car runs rough, stalls out (https://www.rx8club.com/series-i-tech-garage-22/dissasembled-upper-manifold-now-car-runs-rough-stalls-out-246486/)

Oville_rx8 06-08-2013 12:57 PM

Dissasembled upper manifold, Now car runs rough, stalls out
 
Hey hopping someone could give me a hand here, was taking appart my uim earier today, when i reassembled everything the car starts but runs extremely rough and stalls out unless I keep on the throttle.
I also unplugged the battery while i was working but this is not the car trying to relearn its fuel trims, ive experienced that before and this is different.
My guess is i forgot to connect something to do with the air pressure or put something in the wrong place.
Does anybody have any ideas as to where i should begin my search?

Junkman 6394226 06-08-2013 02:41 PM

MAF sensor, electrical connections, and any vacuum lines connected to the intake. Just off the top of my head.

Junkman 6394226 06-08-2013 02:44 PM

I've had similar fuel trim problems on my car, and I found that my car won't learn its idle unless you let it do so by itself (no AC or defroster). Mine will usually stall 3-7 times before learning to idle if I try to help it with the gas pedal.

Oville_rx8 06-08-2013 02:52 PM

appreciate the response, mafs connected, theres 3 hoses connected to the intake tube, not sure about electricals, theres three plugs behind the uim that are in correctly so not those, i dont think its trying to relearn fuel trims, if had that before and the car would always idle fine until it warmed up, thats when the idle would get rough/stall. ill attempt to let it idle again, you never know

Oville_rx8 06-08-2013 02:59 PM

just tried to let it idle by itself again, no luck, tried 4-5 times with each attempt showing no improvement. car starts up normally then dies with 2 seconds.

Oville_rx8 06-08-2013 03:01 PM

are there any specific connections/ plug-ins that I should be looking for, otherwise im just gunna have to take the mani apart again and reassemble.

Oville_rx8 06-08-2013 04:47 PM

figured it out the manifold was loose on one end, tightened it up and it runs fine.

Junkman 6394226 06-08-2013 10:57 PM

Good to know! Wish I could've helped more, but I've never messed with anything rear of the throttle body... Yet.

wcs 06-09-2013 07:27 AM

The re-learn of fuel trims is BS IMO

If your computer is struggling that much to learn trims something else is wrong.

Glad you got it figured out.

Don't know where you're located in O'ville but we had a mini meet yesterday and did a cruise on River Road ... it was a good day.
Sorry you missed it.

PM me

Oville_rx8 06-09-2013 09:19 AM


Originally Posted by wcs (Post 4485143)
The re-learn of fuel trims is BS IMO

If your computer is struggling that much to learn trims something else is wrong.

Glad you got it figured out.

Don't know where you're located in O'ville but we had a mini meet yesterday and did a cruise on River Road ... it was a good day.
Sorry you missed it.

PM me

Wow had no idea, i woulda gladly came out, next time I guess! Ya generally with the fuel trims i find if I Just start it and let it sit till it warms up them its fine

wcs 06-09-2013 10:06 AM

Cool.
There's a great pub in Tera Nova we like to hit.

Yesterday we just did some trans and diff fluid changes.

I think Darkbrew will be coming back up from Burl's in a couple weeks.
Probably doing a oil change and maybe a his brothers BHR kit if it has arrived.

I'll PM you.

Oh I've got a WWP RX8. I live over on the west side.


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