Engine Revs Pass 5, But No Pickup- Pajeroio

[Y3K]

Hi Guys,

Am having a huge problem with my GDI.

Rescently I changed the 4-Wheel actuator (vaccume valves as they call it) and did an injector cleaning.

Since then my IO does ok on eco drive, but when I gun it down for quick acceleration, engine revs pass 5 but the vehicle never picks up.

(The gear is not seems to be shifting)

Before going for this repair, engine rev went down tremendously when the vehicle is idle (at traffic jams) to the point of almost stopping. The injector clean was supposed to clear it out according to the diagnosis performed. (But didn't had this problem of engine rev and no pickup. The pick up was fine.)

The actuator was changed due to the constant blink of 4-WD light. The mechanic who changed it inserted the part from a pajero v6 and assured me IO and V6 has the same circuits.

Also my ATF level seems to a good two three inches be above the maximum level.

Any information regarding this problem?

Is having a ATF level above max a problem? Can it cause any side effects?

Can the new actuator cause this problem?

I read in a post that "idle air control valve or your fact idle valve is not working properly, all two of these are housed in the throttle body.You can try cleaning the throttle body firet if it dont work you knpw what to do."

Any comments on this?

Plus if there are any similar probs post on this forum can you guys kindly share the link with me, I did a rough search but could not find a related post.

Thanks.

Edited July 12, 2012 by Y3K

[jdnet]

sounds like you got yourself a transmission issue. To be honest I would just take it to to the agent and get a diagnosis from them before attempting to do anything. IIRC it doesn't cost anything.

[CAR_MADNESS]

Hi,

can you check the following

1- can you Still use 4WD ?

2- If you can , then try re-engaging 4WD (From 2H-4H) ND See it may stop blinking ? If so there might be an issue of the super select solenoids

3- Just check under your vehicle, gear box for any possible damaged wires

Yes high amount of ATF oil is a problem. It will take abnormal time for oil to get heated and in auto gear there will no shift to higher gears unless oil has reached its working condition temperature. (and 2 inch is just too much)

simultaneously check the condition of the oil. If it has changed color. and if you have done above 90k and did not change oil during your last 3 years then yes its time to flush the oil and refill the new.

[NZer]

You def got a slipping transmission which sadly is common on these jeeps.

[Y3K]

CAR_MADNESS:

Yes I can use 4WD and the blinking has stopped.

The mechanic, a trained professional from United motros, said there is a problem with the switches that engage four wheels and just cleaned them up.

ATF color is red and the mileage is above 120k. So will try flushing out ATF and before that will check the gearbox from underneath.

NZer, CAR_MADNESS, jdnet:

Guys, I still have a pending question if it's a transmission issue of the gear box, why doesn't I get any issues in eco drive mode???? The shifting works fine and the car runs smoothly!

jdnet:

Yep, I got a diagnosis done by united mortors as well, and the results say, everything is ok

[CAR_MADNESS]

CAR_MADNESS:

Yes I can use 4WD and the blinking has stopped.

The mechanic, a trained professional from United motros, said there is a problem with the switches that engage four wheels and just cleaned them up.

ATF color is red and the mileage is above 120k. So will try flushing out ATF and before that will check the gearbox from underneath.

NZer, CAR_MADNESS, jdnet:

Guys, I still have a pending question if it's a transmission issue of the gear box, why doesn't I get any issues in eco drive mode???? The shifting works fine and the car runs smoothly!

jdnet:

Yep, I got a diagnosis done by united mortors as well, and the results say, everything is ok

I guess you do have a problem with the one of switchs. It is called a super select solenoid/s. Cleaning a solenoid will not make a difference if it is blown. You have to find the blown one and replace it. Lets say if you have put the gear to 4H and if the solenoid is blown you can not change it back to 4X2WD it will reamain as 4H. So Back again when you will shift your gear liver to the 4H it will not show any error but if you will put to 2H, it will detect the error agin.

[The Don]

I guess you do have a problem with the one of switchs. It is called a super select solenoid/s. Cleaning a solenoid will not make a difference if it is blown. You have to find the blown one and replace it. Lets say if you have put the gear to 4H and if the solenoid is blown you can not change it back to 4X2WD it will reamain as 4H. So Back again when you will shift your gear liver to the 4H it will not show any error but if you will put to 2H, it will detect the error agin.

I don't think that is his current problem. His issue is when he pushes the accelerator down suddenly the engine revs go up but the vehicle does not gain speed.

I think we are all in agreement that this is probably a transmission issue. (OP if the idle valve controller problems cause erratic idle or a drop in idle or no idle up when AC is engaged, and your problem isn't consistent with any of that. If anything your engine seems to be responding properly).

Guys, I'm not the biggest expert in automatic cars due to my preference for manuals, but does it not sound like its the kick down circuit or the auto box ECU which is behaving erratically? Could it be sensor related (I'm surprised the agents diagnostics didn't pick something like that up since the Mitsubishi factory diagnostics should detect a sensor failure, unless its the actual ECU at fault)?

[jdnet]

Guys, I'm not the biggest expert in automatic cars due to my preference for manuals, but does it not sound like its the kick down circuit or the auto box ECU which is behaving erratically? Could it be sensor related (I'm surprised the agents diagnostics didn't pick something like that up since the Mitsubishi factory diagnostics should detect a sensor failure, unless its the actual ECU at fault)?

Well even if it's an ECU problem the agent should be able to pickup on it with the scanner right?

@y3k

Does your car shift normally when you aren't gunning it?

[jdnet]

wait... when you said your 4wd light was blinking, did it first occur when you tried to move the shifter?

[Y3K]

The Don:

Right on the button mate. And yes the diagnosis didn't show any issues

"kick down circuit or the auto box ECU which is behaving erratically": is there a way to check this other than diagnostics? (What they did is to hook up the vehicle to a computer and run the diagnostic test!)

jdnet

"Does your car shift normally when you aren't gunning it? ": YES

"when you said your 4wd light was blinking, did it first occur when you tried to move the shifter?" : No, it started to blink over the time and with the replacement of the actuator called superselect valves the blinking problem got solved and right after that this problem appeared.

At the point of replacing the actuator, they said just had a look at the switches which sends signal to the indicators on 4 wheel engagement and found them to be not woring properly. So they just cleaned them up as well. Can this be the cause of the acceleration problem???

Thanks

[NZer]

In eco mode it doesnt allow the vehicle to slip as all gears change slowly just like in a manual. Even in a manual slipping gear box if u drive carefully it will drive ok to a certain limit and will only start to slip if u try to accelerate fast. Same case here.

[CAR_MADNESS]

@y3k

Lets this correctly ....

1- Your Engine Rev till 5000rpm/min but no pick up.

2- Your 4WD button is blinking is it still or not blinking ? If not is it after your cleaning repair? If blinking when you re-engage in 4WD does is stop blinking?

3- Do you have any problem with Eco Mode as well ?

[Y3K]

CAR_MADNESS

1. Correct

2. Now its not blinking.

Yes after the switch clean and replacement of the 4wd actuator(or the so called super select).

..........

3. NOPE. I would say Eco mode is doing really well! (No shifter issues there)

[The Don]

Well even if it's an ECU problem the agent should be able to pickup on it with the scanner right?

@y3k

Does your car shift normally when you aren't gunning it?

If the ECU itself is faulty it does not always report problems properly, but most of the time it reports problems that are not there or multiple failures which are impossible when this happens.

To me it sounds like the kick down is picked up by the ECU, it instructs the gearbox to shift down to pick up speed but the gear does not engage as it should until some time. Considering quite a few things had to be cleaned to get this far could this just be sludge blocking an actuator or a valve in the gearbox?

[Y3K]

The Don

Hi,

If it's just sludge blocking actuator or valve is there a way to clean it up?

Thanks.

[Komisiripala]

I was wondering if it's something blocking valves or filters in the gearbox too. Had a very similar problem with my car and box worked normally after replacing solenoid filters and cleaning another filter in there.

You might want to have your gearbox looked at either by united or someone with experience with boxes

[The Don]

The Don

Hi,

If it's just sludge blocking actuator or valve is there a way to clean it up?

Thanks.

Well the process is different for each gearbox. I suggest you take it to a specialist. Komi's (the post above) mechanic seems to be a man who understands autos so might be a good candidate.

[Y3K]

The Don, Komisiripala

Hi,

You guys were right on the button mates.

The gear box had a blocking and after a full flush and gear oil replacement, it works like a charm

Thanks guys(including all of you who took time to review n was kind enough to reply to this thread) for all the advice n swift breakdown of the overall question.

[fuzzo]

a bit late to this party but i had the same issue on my GDI not to long ago. it was fixed with a ATF change

this was then followed by a failing/clogged gdi pump. this was sorted without going down the expensive route of replacing the pump.

[Y3K]

Hi,

fuzzo: Never too late mate now if someone else comes up with this type of a problem, there's proof for the most feasible solution

BTW just out of curiosity "failing/clogged gdi pump" how did you get this fixed?

Thanks.

Edited September 2, 2012 by Y3K

[fuzzo]

that workshop i take it to actually repairs the pump if needed and changes the filters etc etc. you can finish the job in about 30k vs 100k at the company.

[The Don]

The Don, Komisiripala

Hi,

You guys were right on the button mates.

The gear box had a blocking and after a full flush and gear oil replacement, it works like a charm

Thanks guys(including all of you who took time to review n was kind enough to reply to this thread) for all the advice n swift breakdown of the overall question.

Glad you got it sorted!