another please help from b-ron
 

my car wants to fall on its face the majority of the time when i go into reverse and only reverse, if i give it light throttle it hickups a little then dies and if i give it a lot of throttle its starts fluttering it kind of sounds like a two step. I think it might have to do from running rich and flooding my engine with fuel but then again it doesnt happen when i go forward.

any help would be awesome !!!!!! i just want to get everything running right befor sat dyno day

Only in reverse?! Thats fucking weird.

exactly lol i asked some of the techs at my work and all they really said was bad driver lol

any thoughts would be awesome

sorry man, thats weird.
almost makes me want to agree with the techs.
good luck.

lol me to but i made them do try it the same thing happend to them. so unless all the techs suck at driving to then im back to square one

I dont understand what dropping into reverse would change tuning wise.

me either i will have a vid up tonight maybe but i data loged it i dont kbow if that will help anything

Maybe a bind in the reverse gear? Does the car roll at all in reverse?
Isn't there a neutral/reverse saftey switch/sensor? That my be bad or not connected fully.
These are shots in the dark. :trink26:

yes it rolls in reverse

now that i think about it about 80 percent of the time it happends is when its the first start up of the day or if it has ben parke for a few hours but it still will do it after the car is warmed up

http://spreadsheets.google.com/ccc?k...4-Md-KaQ&hl=en

here is a link to my data log when driving in reverse i thin it stated really messing up around the 15th colum

How long do you let it warm up, what are the RPM's when warmed up, where do you park it outside/inside, how cold is it where you live?

i let it warm up for about a min, the temp around my area now is nights are low 40s and days are in the 60s. i park it in the drive way or in the garage it depends, but even if the car is back from a long drive and if i put it in reverse it will sometimes do it

Hey B-

I did a search and some of the listed answers i got were as follows:

Incorrect idle speed
Clogged Fuel Filter
A Fault somewhere in the fuel system
Faulty Emissions system components
Faulty or incorrectly gapped spark plugs
Vacuum Leak at the throttle body, Intake manifold or vacuum hoses

Also I jumped into a mercedes benz forum where a guy was having the same problem.

On their cars there was a neutral cutout switch that had a dual function as a trigger for the reverse lights.
Apparently there was some sort of grounding out issue.

I dont know if this applies to our cars at all but you might want to check around your transmission and see if there are any electrical wires coming off your transmission. Alternatively check your fusebox and start testing all the fuses that have anything to do with reverse.

I'll take a look under my car tomorrow and see if i can gain any insight into what might be happening to you.

good luck man.

wow thanks for the help. i know for sure im leaking out od the turbo mani but thats it, im taking everything off today and then putting everything back

Have you recently installed a short throw shifter or had your center console apart for any reason? Take apart your console it takes about a minute make sure everything is plugged in. Also make sure the shift into reverse is moving smoothly. If you know anyone with a MS3 take theirs apart as well (after you ask of course) and make sure everything looks the same. Just another idea before you go taking everything under the hood apart.

hmm... okay... have you checked to see that your e brake/rear brake pads arent binding at all. I had this problem where my rear brakes would bind slightly and if i didnt slip the clutch a little, the car would bog in reverse.

Let me know,
jeff

i checked my spark plugs and wasnt to happy on wat i found

http://i20.photobucket.com/albums/b2...6/DSCF9100.jpg
http://i20.photobucket.com/albums/b2...6/DSCF9101.jpg
http://i20.photobucket.com/albums/b2...6/DSCF9102.jpg

the oil is only on the threads should i be worried?

i checked all the connections they are good i will check the break pads

hmmmm Oil shouldn't be working its way into your threads as far as i know.

wtf,that oil should not be there.

thanks for pointing that out lol jk i feel sick to my stomach

should i just clean them up put them back in go for a drive then check them again

Saw this on the web talking about turbo buicks ... I know they are not DISI but .......

"A spark plug shorted by excessive oil entering the combustion chamber is shown below. This is often caused by piston rings or cylinder walls that are badly worn. Oil may also be pulled into the chamber because of excessive clearance in the valve stem guides, or badly worn valve stem seals. If the PCV valve is plugged or inoperative, it can cause a buildup of crankcase pressure. This condition can force oil and oil vapors past the rings and valve guides into the combustion chamber"

:ugh2:

heres an off chance.....disconnect your reverse light bulbs, then see what happens. if it works i'll tell you the reasoning haha, probably not though just an off chance thats the problem.

i found this unplugged i have no idea why

http://i20.photobucket.com/albums/b2...6/DSCF9104.jpg
http://i20.photobucket.com/albums/b2...6/DSCF9106.jpg

what is that plug for?

i don't have acess to my ESM here, what color is it, i can help you when i get home, and did you find what it goes to? is it a ground?

do all ms3 have that hook in the last picture????

Yep

ok i was talking to a tech that i know and he said that it is most likely the tps thats causing the reverse issue and about the spark plugs he said not to really worry because its on the top part of the threads and not at the electrode part of it

Ha oil last time I checked is not part of the combustion process. Think about that and let me know if oil ANYWHERE on the spark plugs is cool. When I had that on my cobalt ss/sc it was on cyl 4and it was oil blow by.

ha its probably not on the electrode cause it burned off. has your exhaust been smoking a lot? check your pcv and make sure its not plugged up.

zero smoke, and yes i agree about only being on any part of the spark plug but if it was a bad ring or somthing oil would be all over the spark plug hole but yet mine is dry as a bone so what i think happened was when i last took off the valve cover i was in the drive way and its a slanted back alot a lil bit of oil might have rolled in off the flat parts were the valve cover gasket meets the head. even it was a lil drop once its on the threads and you screw it down the oil will climb up the threads. just a shot im the dark on what could have happen

ok i just installed my rear motor mount i know i know im fully bolted and still on stock motor mount anyways i when out for a drive and holy shit wat a diff, i put my car in reverse 5 times and it was fine and my the rubber on my stock mount was ripping off were it meets the metal, do you think this could have been the prob the whole time?

the only way a mount would create any problems is if it was so loose it was actually pulling on a harness and creating a short. When put in reverse a throttled the motor twists in the opposite direction. check your harnesses especially the pcm connectors also there are 2 grounds on the front of the transmission which have caused alot of weird issues.

ron do you have a pg mani for sale also?? lol

no that staying on the car lol

streetwerks: my rear motor mount was torn i put my trz in and have not had the problem!!! i have put 120 miles on the car and reversing every chance i get and it works perfectly no stalling or hesitation