Need some help guys
Thread Starter
Newbie
Joined: Aug 2016
Posts: 7
Likes: 0
1996 sl55 amg
Need some help guys
Could anyone help me with a j2008 jeep grand cherokee sporting a mercedes 3.0 liter diesel..it has a p0088 code for high fuel pressure ..my scan tool reads digital pressures ..have done lots of research but have almost as many conflicting diagnosis'..How do i diag
nose properly?pls and thx in adv..
nose properly?pls and thx in adv..
Last edited by PeterMB333; Aug 22, 2016 at 01:56 PM.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
It can be sensor, or could be pressure regulator valve on the end of the rail.
Some members report that tapping the valve with butt of screwdriver fixed the issue.
Is the engine running ok?
Some members report that tapping the valve with butt of screwdriver fixed the issue.
Is the engine running ok?
Thread Starter
Newbie
Joined: Aug 2016
Posts: 7
Likes: 0
1996 sl55 amg
Thx in adv for everyones input.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Don't be shy posting your location as we have members from all over the World and they might give you advise specific to your market.
Most likely your local shops will have mechanical pressure gauge to hook up and test, like Plutoe advised.
Or getting other sensor from different car might be easy possibility
In US sensors are relatively cheap, so I would probably just buy new to start. Valve is going to be more expensive.
Most likely your local shops will have mechanical pressure gauge to hook up and test, like Plutoe advised.
Or getting other sensor from different car might be easy possibility
In US sensors are relatively cheap, so I would probably just buy new to start. Valve is going to be more expensive.
Thread Starter
Newbie
Joined: Aug 2016
Posts: 7
Likes: 0
1996 sl55 amg
I have a mac trans and fuel pressure tester but have yet to try and fit one of the various adapters to do a proper test..im an ex honda/mazda tech but unfamiliar with diesels but enjoy learning/researching for headbanger answers..This one though is proving difficult. Im in winnipeg man. Canada and havent found anyone that knows much about this diesel ..local mercedes dealer wont help as its a jeep and jeep is in my opinion unknowledgable and of no help...never mind very expensive for parts..
Thread Starter
Newbie
Joined: Aug 2016
Posts: 7
Likes: 0
1996 sl55 amg
So on my scan tool with koeo...pressure bounces back and forth between 450 and 650 kpa...koer pressure starts at 50 -60.000 kpa for about 10 sec until idle calms down and then settles to 30750 kpa...converting kpa to psi shows me thats only roughly 8000 psi ..doesnt make sense as thats not high enough..any thoughts ?btw tapping the pressurevregulator and pressure sensor didnt change readings
