Loss of power 3200GT

[OGAJOE]

But as its down on power and down on oil pressure it makes you think!

Dave

I took a one-hour drive and no issue power was there...
5 bar most of the time 2.5-3 at hot idle. Revs bring pressure back to 5. As usual...
I will check pedal pot voltage and have the crankshaft end float measured next month as I work abroad...

 

[jluis]

That pressure is too low.
Get it checked asap

 

[StuartW]

I took a one-hour drive and no issue power was there...
5 bar most of the time 2.5-3 at hot idle. Revs bring pressure back to 5. As usual...
I will check pedal pot voltage and have the crankshaft end float measured next month as I work abroad...

That sounds like normal behaviour but yes, best to get it checked - good luck

 

[jluis]

2.5 at idle is not normal.
Mine even hot and with 30 degrees outside is always at 5.
It only drops slightly when going from stationary if i let the rpms drop too much by giving too litle gas.

I know the sensor is not reliable but one should always assume the reading to be correct.
It doesnt take much to go from a sloght problem with oil pressure to a trashed engine.

The precious owner of mine had endfloat issues and EVERYTHING except the engine heads and sump was replaced.

 

[OGAJOE]

2.5 at idle is not normal.
Mine even hot and with 30 degrees outside is always at 5.
It only drops slightly when going from stationary if i let the rpms drop too much by giving too litle gas.

I know the sensor is not reliable but one should always assume the reading to be correct.
It doesnt take much to go from a sloght problem with oil pressure to a trashed engine.


The precious owner of mine had endfloat issues and EVERYTHING except the engine heads and sump was replaced.

I'm worried by what I read here but then I saw Conaero message on other thread :

Oil pressure sender or your clutch is not disengaging completely (causing revs to drop to 700rpm and correctly throw the ERROR OIL warning)

Your gauge is directly linked to the rpm which in turn links to how fast the pump spins.

Correct readings:
Cold idle: 5 bar
Cold 3k rpm plus: 5 bar

Hot idle: 2.5 bar
Hot 3k rpm plus: 5 bar

 

[Contigo]

Those readings are wrong.

I assume:

COLD: 5 bar idle, 5 bar speed
HOT: 3.5-4 bar idle, 5 bar speed (HOT idle, I get 3.5 bar in the summer and 4 bar in the winter)

 

[Steve GS]

My car idles at 2.5 always has as soon as i touch the faster peddle the pressure shots up to 5

 

[jluis]

Well, mine never drops 5 and other members here say the same.
Other members here say the same while others say the pressure does in fact drop.

I would get it checked nevertheless

 

[OGAJOE]

Well, mine never drops 5 and other members here say the same.
Other members here say the same while others say the pressure does in fact drop.

I would get it checked nevertheless

Yes I will get it checked anyway. A month ago I ask the mechanics to check pressure directly at engine bay and he told me it was ok. I don't know how much is ok though lol

My idle is between 800-900 so I would suggest also is a bit low. 1000rpm would give me 3 bars.
The error oil is flashing when being a low speed the car almost reach the stall point but that sounds logical.
The only new symptom is that loss of power after 4500 rpm but it could be something else. And the fact that power is 100% available sometimes does not help to find issue

 

[Contigo]

Well, mine never drops 5 and other members here say the same.
Other members here say the same while others say the pressure does in fact drop.

I would get it checked nevertheless

Then your sender is wrong. There has to be an oil pressure difference between idle and under "load" conditions.

 

[jluis]

Is there any acessible location in our engines to plug an external gauge to know for sure?
The lication of the sender is a pita to get at

 

[CatmanV2]

My car idles at 2.5 always has as soon as i touch the faster peddle the pressure shots up to 5

Totally different engine, chap

C

 

[davy83]

There your problem right there, idle speed is 1000 rpm not 900 this is too low. it is often higher than this. i wonder if the crank speed sensor is goosed and the ECU cannot control the idle speed properly? any problems with the throttle while driving? could be the throttle body, if its the original one its overdue a wobbly?

Yes I will get it checked anyway. A month ago I ask the mechanics to check pressure directly at engine bay and he told me it was ok. I don't know how much is ok though lol

My idle is between 800-900 so I would suggest also is a bit low. 1000rpm would give me 3 bars.
The error oil is flashing when being a low speed the car almost reach the stall point but that sounds logical.
The only new symptom is that loss of power after 4500 rpm but it could be something else. And the fact that power is 100% available sometimes does not help to find issue

 

[OGAJOE]

There your problem right there, idle speed is 1000 rpm not 900 this is too low. it is often higher than this. i wonder if the crank speed sensor is goosed and the ECU cannot control the idle speed properly? any problems with the throttle while driving? could be the throttle body, if its the original one its overdue a wobbly?

Hi Dave TB contactless version. No special issue with throttle since pedal pot connection refurbished...

 

[Contigo]

I would say that the idle speed as Davy points out is too low. Disconnect the Pedal pot and the car should idle at 1k rpm (pre-programmed ECU parameter). Try to measure the voltage on the pedal pot to see what they are at idle and full throttle. I would also look at the TB too but also a lower idle could be the signs of a vacuum leak. Check O ring seals under plenum chamber too.

 

[lee]

Boost, turbo wastegates get jammed sometimes so make sure there free x2 and also most likely the boost control valve terminals have corroded 2 pins Need cleaning!!!

Sent from my D6603 using Tapatalk

 

[OGAJOE]

Some update :

Engine has been working fine with 100% power available until... CEL and limp mode associated with P0225 error code : pedal pot.
My pedal pot connection has been hard wired and was ok since then.
I think that all this power issue was linked to that PP.
I'm a bit tired of my 3200 gt experience... I have been experiencing limp mode 35% of my driving time...

 

[jluis]

Some update :

Engine has been working fine with 100% power available until... CEL and limp mode associated with P0225 error code : pedal pot.
My pedal pot connection has been hard wired and was ok since then.
I think that all this power issue was linked to that PP.
I'm a bit tired of my 3200 gt experience... I have been experiencing limp mode 35% of my driving time...

These are demanding mistresses ...
Hope you don't use it as a daily drive

 

[OGAJOE]

No I live abroad then I use every two months . But each time I came back there are issues and it is affecting my ownership experience

 

[jluis]

Well, the good news is that your problems seems to be related to the dbw system that is well known so you will eventually be able to sort it out.

You are using a standard pedal pot and a refurbished throttle body, right?