Haveing a problem with the car whilst idling.

 

Yesterday it seemed to be hunting around when stopped at traffic lights, would drop to 750rpm then edge up to 900ish.

 

Was the same today, so went to get some V-power. After getting back in the car, I noticed the boost gauge was at 0 on idle, and wasn't moving at all whislt driving. Dropped back down when I switched the engine off.

 

It now seems to be revving at 1500rpm whislt at idle.

 

Any ideas on what the problem could be????

Firstly sounds like you have a small boost leak, have you taken any pipes of recently, if so check them. If not, make up a leak detector (search on this forum) only takes a little hose of to cause one.

 

2nd. I had high revs a couple of weeks back upto just under 2k, checked the temp sensor on the top hard water pipe and found to be all green and crud. cleaned with some ambersol contact cleaner and a very small file, also did the smaller temp sensor and the maf. HAsnt done it since and ticks over lovely.

 

Stu

Yeah was thinking boost leak, would explain the rough idle.

 

Haven't taken any pipes off recently, will check the temp senders.

 

Just tried resetting the ECU, boost gauge still stuck on 0 but now just rough idle under 1000rpm

Maybe check the stock boost sensor hose and connections (rear drivers side of engine bay). I would say the boost sensor hose was off or damaged but having the boost drop again when the engine goes off is illogical...

 

H

Not going pas 0 is normaly a sign of a siezed turbo fella!

 

Fingers crossed im wrong though.

check all the little vacumn hoses

Not going pas 0 is normaly a sign of a siezed turbo fella!

 

Fingers crossed im wrong though.

 

Hope not:wack:

 

But the fact it just sits at zero while the engine's running makes me think there's a lack of a vacuum, so hoping it's just a pipe off/crack.

 

Will have a look at the sensor today.

I hate it when someone asks a question and the thread is left unanswered, so....... :)

 

Turned out to be 5 leaks :shock:

 

Two major (engine intake pipe, MAF intake pipe) and three smaller ones.

 

All sorted now, car back to peak health :):tongue::):tongue:

LOL... thats some extreme leakage! I had a small leak the other day which turned out to be the stock boost guage sender had split, could hear the hissing in the engine bay at idle , was driving me mad looking for it until i found it by chance when poking about! Had split on the connector so would only hold -7psi and + 7 psi.... some gaffa tape and a minute later and were back at -14 at idle (when warm) and +12 on boost :D