ZTerrell

I have an 04 Rx-8 GT and for some reason when the car gets to normal temp. it wants to bogg down and stall out??? Why is this?? I just replaced the MAF sensor and still is doing the same thing!!

RX8Soldier

iTrader: (24)

There you go

Ahh you didn't mention that you replaced the MAF in your other thread. Do you have any mods? How many miles on your engine?

I'm gonna go on a whim and say that you need to reset the ecu (unplug the battery for 5 min). Then, drive your car for approx 3-6 drive cycles (may take a few days). This will allow your ecu to relearn the fuel trims (cause by replacing your MAF sensor).

ZTerrell

Thanks Man, and i just put the motor back in last night from a rebuild so no miles...just backouted of the garage so smoke didnt chock me out in the garage from the vasline in the motor. And i also cannot drive anywhere because if i let off of the gas it will drop off under 1k rpm and stall out ( only when the car has reached normal temp) Thats the weird part???

RX8Soldier

iTrader: (24)

have you reset the NVRAM? https://www.rx8club.com/series-i-specific-performance-mods-97/have-any-one-succefully-reset-their-ecu-164114/#post2817144
Try step #2

StealthTL

iTrader: (1)

Title changed from the ever-popular "I'm fukd"

ZTerrell

I have tired all the resest that you can do. Ive also had my friend from autozone bring one of those computers over and clear it. When i have the key in the on position it blinks 7 times then one fast blink then stays on? this means overheating??? Im thinking (by reading other post the cat could be clogged and this is not letting the car idle....also it wont start again after the car gets normal temp and stalls out if i dont keep on the gas to keep it alive????

monchie

Do you know when was the last time the fuel pump and the fuel filter was changed?

Twisties

check out the misfire thread, test all the components listed, replace as necessary.

search misfire thread title in the advanced search function, should show up as suffering from a misfire start here

plugs coils wires? need some specs on the vehicle to help further

Harlan

iTrader: (3)

My money is on swapped plug wires. Since the engine was just replaced seems likely enough.

ZTerrell

Thanks guys but i did all of this when i did the full rebuild....I am seriously mind fukd when it come to whats wrong with the car??? ive spent days on the internet trying to find out what it could be??? The only code im getting is collent temp sensor which i have replaced and lights still on?????????

RX8Soldier

iTrader: (24)

did you do the build yourself? Have you been able to test drive?

nycgps

iTrader: (1)

I like how people have no idea how the car works and decided to "I'm going to rebuild and/or install the engine myself!"

and this is what will usually happen ---- everything is fuked

no offense but there is no way we can answer ur question, we have no idea what you did, we dunno if u crack/broke some wires in the process, it can happen without stripping the plastic on the outside, too many possibilities.

ZTerrell

Yes i did the rebuild myself and im 19 years old...And whoever the hell you are that just made that comment i fixed it again YET alone by myself it was a clogged cat too much backpressure at the front of the cat, thats why it blew seals in the motor..Thank you but im more than sure i know a little bit more than you when it comes to these cars Other than that shut that **** up! And to RX8soldier thank you for your advise by the way...

StealthTL

iTrader: (1)

My money is (as usual) on a vacuum leak.

Easy to miss a line or crack the UIM, etc.

If you can get someone to hold the engine at 1500 revs, then spray shots of brake cleaner around the bay to find a leak....

Check the nipple under+behind the throttle body.