Boost or loss of power between 4000 to 5000
07 December 2007, 01:15 AM
#1
Boost or loss of power between 4000 to 5000
Having problems with boost bewteen 4000 to 5000 rpm in all gears. When I put the foot down upto 4000rpm car pulls hard, but when I hit above 4000 to 5000 the revs still climb, boost is still climbing on the boost gauge but car doesnt pull.
Ive replaced the maf {done the maf test unplug it when idle and it cuts out}, cleaned out the boost solenoid, put 4 brand new coil packs on, had a check around the hoses nothing stands out. Done an ecu reset.
Ive bought new spark plugs and a lamba sensor both still to be fitted.
What else can I do here any comments please to help me sick scooby out.
Can someone confirm ive got the correct lamba sensor with pics ive supplied.
Also stamped on the part is:
LSH23
0258003995
4880321
12V
982
Ive replaced the maf {done the maf test unplug it when idle and it cuts out}, cleaned out the boost solenoid, put 4 brand new coil packs on, had a check around the hoses nothing stands out. Done an ecu reset.
Ive bought new spark plugs and a lamba sensor both still to be fitted.
What else can I do here any comments please to help me sick scooby out.
Can someone confirm ive got the correct lamba sensor with pics ive supplied.
Also stamped on the part is:
LSH23
0258003995
4880321
12V
982
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07 December 2007, 11:49 AM
#9
Scooby Regular
'When I put the foot down upto 4000rpm car pulls hard, but when I hit above 4000 to 5000 the revs still climb, boost is still climbing on the boost gauge but car doesnt pull.'
sounds like the clutch is slipping to me rather than a sensor issue? or have i missed something here?
sounds like the clutch is slipping to me rather than a sensor issue? or have i missed something here?
07 December 2007, 01:40 PM
#13
Scooby Regular
yeah mate doesn't sound like a sensor issue at all, if it was and the ecu was backing off then you'd drop revs, boost would drop and you'd slow down. If its clutch you'll still get the revs and boost but you go no where. I def think its your clutch so i wouldn't spend any more time chasing ghosts and get that looked at.
07 December 2007, 03:46 PM
#14
**UPDATE**
Took the car for a spin. If I drive the car sensible through the gears it pulls all the way up the revs with no probs. If I floor it through the gears, when I hit 4000rpm the boost stays at 0.5 bar, then when the revs hit 5000rpm the boost climbs upto 0.9 bar.
Spoke to my mate whos a mechanic, he reckons its either the spark plugs or the lamba sensor. As the car was fitted with colder spark plugs { NGK PFR7B } 5 weeks ago in its service. He thinks the plugs could be the root of the problems. Anyway the car is booked in on Tuesday to sort it out
So far Ive been told it could either be:
the clutch slipping
failing maf
failing coil packs
failing cat
split hose
faulty spark plugs
I will post my out come to the root of the problem when its comes back from the garage, so it may help someone out in the future
Took the car for a spin. If I drive the car sensible through the gears it pulls all the way up the revs with no probs. If I floor it through the gears, when I hit 4000rpm the boost stays at 0.5 bar, then when the revs hit 5000rpm the boost climbs upto 0.9 bar.
Spoke to my mate whos a mechanic, he reckons its either the spark plugs or the lamba sensor. As the car was fitted with colder spark plugs { NGK PFR7B } 5 weeks ago in its service. He thinks the plugs could be the root of the problems. Anyway the car is booked in on Tuesday to sort it out
So far Ive been told it could either be:
the clutch slipping
failing maf
failing coil packs
failing cat
split hose
faulty spark plugs
I will post my out come to the root of the problem when its comes back from the garage, so it may help someone out in the future
Last edited by slipstream_uk; 07 December 2007 at 03:55 PM.
07 December 2007, 04:13 PM
#18
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Join Date: May 2007
Location: Way out in front!!, wheels spinnin, flame spittin, turbo spoolin!!! --- Go home love, nobody cares!
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Its the plugs mate had similar prob with mine replaced maf coil packs lambda sensor and then plugs was only when I changed the plugs it cured
07 December 2007, 05:32 PM
#19
Personally I think its the plugs as well. May as well do the lamba conversion, since ive got a new one here.
{move the lamba to the downpipe & disconnect the one in the manifold}
The coils packs I removed are in excellent condition, sale any one ?
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