Question about 2004 Porsche Cayenne

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My Cayenne Turbo is misfiring, jerky and idling erratic

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Check the ignition coils and the wiring for the injectors. The wiring looms for the injector become brittle in hot climates or after a coupe of years

Posted on Jun 25, 2013

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Is it possible you got bad gas, check for vacum leaks in engine compartment,ifyou have one you should be able to hear it with the engine running,Note with a Turbo if the engine has a misfire this could cause damage to your Turbo very expenceive .take care of it asap.

Posted on Apr 01, 2011

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EGR faults


1.6b) Symptoms of faulty EGR
Associated OBD2 error codes DTCs: P0400 - P0409; P1403 - P1409 other common codes can include 'multiple misfire P0300'

The EGR has two possible fault modes either it is 1) open when it should be closed or 2) closed when it should be open. (See also DPFE faults)

'Open' faults
  • Erratic idling: 'hunts' at idle with erratic engine performance when running. This is due to the air ingress through the split diaphragm or the EGR valve being left open, either event compromises the intake manifold vacuum and in turn this interferes with the ECU's ability to deliver accurate fuel to air ratio for a given engine speed.
  • Sudden engine stall: In addition to the rough idle, a hot running engine when quickly brought to idle (after the car comes to a halt at a junction) can stumble and then stall. The engine will hesitantly restart immediately: this is significant difference to Crank and Camsensor error.

'Closed' faults
  • Misfire and 'pinking': if the EGR is jammed closed or the exhaust feed pipe is blocked (with baked on carbon deposits) the engine runs lean and very hot, so hot in fact that the fuel air mix in the cylinder can spontaneously ignite causing a misfire. The misfire if pronounced can, in turn, be detected by the engine knock sensors (P0300) leading to a 'check engine light' warning and reduced engine speed limitations.
Inherently diesel engines create more soot in the exhaust and as a result blocked EGR assemblies are more common in diesels than petrol engines.
  • Burnt Exhaust Valves. Prolonged exposure to excessively high ignition temperatures brought about by a blocked EGR system can lead to exhaust valves being over heated to the extent that they become distorted and so no longer seat properly. Poorly seated valves prevent good compression.
  • Surging: A sticking EGR valve can lead to an effect of rhythmic surging a bit like the MAF fault, especially in turbo charged engines. Normally on a warmed up engine the vacuum from the inlet manifold opens the EGR. If the EGR fails to open promptly the turbo can be subject to a slight boost. Extra fuel/air mix is pushed into the inlet manifold as a result, increasing pressure (decreasing the vacuum). Without vacuum in the inlet manifold the EGR closes again but if sticky only does so slowly. This may allow inlet gases to flow through the EGR into the exhaust manifold for a split second. There is a time lag in the sequence of these events leading the engine to surge in cyclical manner.
NEXT 1.6c) EGR how to fix



on Jul 15, 2011 | Mercedes-Benz E-Class Cars & Trucks

1 Answer

Isuzu 4jh1 engin3 idles at times then sudenly erratic on idle then cuts out falt code p1651


no car stated
no year.

that is called misfire.
1996+ Isuzu in USA? where?
P1xx are factory codes, so dont read ford codes...
its a diesel
"The 4JH1-T is a 3.0L OHV direct injection engine, turbo intercooled which replaced the 4JB1T in the Faster/Rodeo pickups. This vehicle was sold as the Holden Rodeo in New Zealand and Australia. On some models it features an electronically controlled injection pump. "


so are you DOWN under posting on Gren'go USA forums? seems yes. so we dont have books on down under engines. here.

so i searched using google via Australia mode... not easy

try here in your forums.. and save time an get 100x better answers.
http://www.4wdaction.com.au/forum/viewtopic.php?f=104&t=141827

Mar 05, 2015 | Isuzu Cars & Trucks

1 Answer

I have a 2004 Porsche cayenne turbo that keeps blowing the 5amp fuse in the engine compartment fuse box.


I would suggest taking it to Porsche and having them diagnose the problem...

Apr 25, 2014 | Cars & Trucks

1 Answer

Hello, I have a problem with my gearbox 2004 Cayenne Turbo - I can only drive In manual as it struggles selecting gears and get a jerking/clunking sound in low gears, I also have to turn the traction...


Sounds like a vacumn leak causing the shift points and idle speed to be affected. Look for off/or cracked vacumn lines/connections. Hope this helps,.

Oct 22, 2013 | 2003 Porsche Cayenne

1 Answer

What is the good battery brand for porsche cayenne turbo


Interstate makes a good replacement battery. Be aware that the Cayenne turbo uses a water cooled alternator that fails and appears good, but drains the battery over a night or two. This brilliant design also takes out the waterpump when the alternator bearings disintegrate and spit metal bits into the coolant that ruins the waterpump seal. It took me two waterpumps and a new battery to learn this little gem.

Jul 15, 2011 | 2004 Porsche Cayenne

1 Answer

I have a 2005 porsche cayenne turbo The engine idle drops while driving and car seems to stall


This may be due to a reprograming needed, contact dealer and see if there are any bulletins on this problem, also i would check the air filterbox and make sure nothing is blocking air flow, then if all looks good then i would have the computer scanned to see if any fault codes are stored due to this problem.

Sep 10, 2010 | 2005 Porsche Cayenne

1 Answer

My A4 turbo keeps stalling smokes & idles erratically


That sounds correct. When the seals/bearings go out in the turbo, oil that is used to cool/lubricate the turbo is force into the engine through the intake. The oil burns, and smokes. Take of the air filter hose from the inducer side of the turbo, (with the car not running), and see if the blade moves at all (shaft play, up, down, in, and out). If you can move it is probably shot. You can also check for oil in the side that leads to the engine. The only other thing would be to check the compression of the engine. The piston rings could be shot.

May 01, 2010 | 2001 Audi A4

2 Answers

Porsche cayenne turbo has oil consumption problem can anyone help me out


the most common source is the turbo shaft seals leaking oil.

Apr 07, 2009 | 2007 Porsche Cayenne Turbo

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