Porsche Enthusiasts Club Forum

It is currently Fri Jun 27, 2025 9:55 pm
Classic Line Insurance


All times are UTC




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: porsche 944 turbo - rough idle, and erratic starting
PostPosted: Tue Jun 08, 2010 7:08 pm 
Offline

Joined: Thu Feb 05, 2009 8:15 pm
Posts: 38
Location: Stockton-on-Tees
TIPEC membership: 5131
as per title really - don't like the idle - doesn't exactly sound 'sweet'. Rev's fluctuate - more like a hiccough really, but sometimes seems slow to drop from 2000rpm, also occassionally feel the car 'hunting' when you back off the 'loud' pedal - though this seems to have improved with me using the car more. Also sometimes it will start immediately and ranges up to what seems like a long time (worse with a new passenger in car!), maybe up to 4 seconds.
background on car:
battery very recently changed - it is proper spec bosch battery.
starter motor turns the engine at what sounds like a decent speed
plugs changed
plug leads changed to splitfire
new coil lead
new dizzy cap and rotor arm
earth leads from battery to chassis removed and cleaned, to starter motor, and from chassis to engine
battery charges nicely (13.5volts) according to volt gauge on car
new bosch idle control valve
vacuum tubing has been replaced
new fuel filter and fuel lines

would it be worth removing the injectors and getting them tested and cleaned?
DME?
crank angle sensors (the 2 at the top of the clutch housing)?

any thoughts and suggestions would be greatly appreciated
cheers
Mark


Top
 Profile  
Reply with quote  
 Post subject: Re: porsche 944 turbo - rough idle, and erratic starting
PostPosted: Tue Jun 08, 2010 9:25 pm 
Offline

Joined: Mon Nov 05, 2007 6:24 pm
Posts: 3008
Location: Halifax
TIPEC membership: 4636
If it were mine I'd put it on the dyno & check the fueling. Should cost about £50 to £100 for a diagnostic. But you need somebody that understands these cars & knows what there doing. A new AFM will cost you £150 so if it's something else like a vacuum leak say. Or the fuel pressure reg'. You don't want to waste your money. You don't say where your based.

_________________
944 lux, Eco car. Off the road more than it's on!
Audi 2.0 TDI Good but rather boring..........
944 now sold.


Top
 Profile  
Reply with quote  
 Post subject: Re: porsche 944 turbo - rough idle, and erratic starting
PostPosted: Tue Jun 08, 2010 9:28 pm 
Offline

Joined: Fri Feb 26, 2010 9:05 pm
Posts: 2291
Location: Lanark
TIPEC membership: 6030
Stockton-on-Tees it says on eBay?

_________________
Lee.

JOIN THE CLUB, CLICK HERE

2003 996TT

Due to the current economic climate, the light at the end of the tunnel has been switched off!


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC


Who is online

Users browsing this forum: Bing [Bot] and 74 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group