Rb25De Stalls When Put Into Reverse Or Drive

[UCD15R33]

Hi All

Needs some help asap. I'm working on my cousins Rb25de R33 skyline auto. Every time we put it into drive or reverse it stalls. Any ideas why ?

Thanks

[Ben C34]

What's it idling at?

[UCD15R33]

about 800 to 900 when its in Park or Neutral its okay but Reverse or drive it stalls

[Ben C34]

I would try cleaning out the iac. What have you tried?

[UCD15R33]

Yes I have still nothing....

[FJ RB25]

Could be the converter, can't remember why but was told that awhile ago, something to do with the lock up clutch or something

[Ben C34]

Well how about some history on the car, the problem and what you have tried so it's not all guessing.

[UCD15R33]

Sorry guys, Car was been fine up until Wednesday this week. The Car had a miss on Thursday but I found a dead coil easy solved. The auto transmission fluid was replaced Thursday this week. Since then it wouldn't change gear without stalling. I have checked and cleaned the IAC, Replaced all spark plugs, cleaned air filter box and replaced air filter, replace all vacuum hoses but still no go. and replaced the sump gasket.

[UCD15R33]

and I'm just checking the o2 sensor now...

[Ben C34]

Well it certainly sounds related to the fluid change.

Don't bother with the O2 sensor, that won't cause that.

Does it just die or stop suddenly?

What trans fluid was used and how much?

[GTSBoy]

Won't be the oxy sensor. Will either be a problem with the converter (clutch stuck on perhaps - which could be an electrical issue) or an idle control issue. Can you keep it alive by keeping the throttle open or will it then drive forward? Easy way to diagnose both issues at the same time!

[UCD15R33]

No sure 100% but the dipstick says. Its says full but I wasn't there for than part. as soon as it goes into drive or reverse or 2, 3 it stall and cuts out.

[UCD15R33]

No sure 100% but the dipstick says. Its says full but I wasn't there for than part. as soon as it goes into drive or reverse or 2, 3 it stall and cuts out.

[UCD15R33]

if I keep the revs up still dies when in Drive but once it put into park or neutral I can rev it no issue

[UCD15R33]

Update. Got it into 2nd and was struggling to idle gave it herbs and then died.

[GTSBoy]

Sounds like converter is locked. If you're at the limits of your diagnostic abilities at this point, you're probably going to have to tell him to get it to an auto trans specialist. It might be something simple like a wiring fault, but it might be something mechanical that got triggered or otherwise happened when the oil was dropped.

Edited October 17, 2014 by GTSBoy

[UCD15R33]

Yeah I think so. Thanks all.

[FJ RB25]

Sounds like converter is locked. If you're at the limits of your diagnostic abilities at this point, you're probably going to have to tell him to get it to an auto trans specialist. It might be something simple like a wiring fault, but it might be something mechanical that got triggered or otherwise happened when the oil was dropped.

yep thats what I said.

[sleptema]

Pretty sure you mentioned that it does when put in gear like 4-5 times. Righto, thanks mate, wasn't completely sure about that until the 4th time I thought you were just pulling our legs.

What fluid did you use? And how did you change the oil? I have heard of people running the wrong oil (wrong additives/weight) and it would actually weld the transmission and diff together after a while. If it attempts to go into gear it's not the selector. I'd say she's done farked.

[FJ RB25]

Hey UCD

When even trying to diagnose a problem it is often a good place to start at what has been changed as in majority of cases this is a good place to start ( not broke before changing anything but now is after changing something )

You are saying that the trans oil has been changed but you were not present when the oil was changed ( is this correct ?)

And

You had a problem with a coil ( did you test the car after you changed the coil) ?

The problem you are describing sounds like a converter lock up clutch staying locked up ( google how a converter works and you will see some vids on YouTube)

Basically a converter clutch will lock up at a certain rpm, I.e. 2500 rpm stall = lock up clutch will lock up at 2500 rpm

If your lock up is locked up from the get go then you will stall the engine either in reverse or drive.

If the engine is standard then the converter should lock up around 2000 rpm I think.

Not sure how you could test if it is the converter but I would imagine that if the engine was kept above the converter stall it should run. I.e if you took the car to 2000rpm and changed gear each time above 2000rpm or stall then it shouldn't stall in theory.

Now I have had Eff all to do with auto,s but that is what I have self learnt from the net and YouTube, reading books, not having a dig here but look at the net or ring a auto trans shop.

All the best mate, oh and before anyone else mentions

Stick a turbo on that De

Edited October 17, 2014 by FJ RB25