Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: big-o-bob on 12 May 2009, 13:49:49

Title: Running lumpy?
Post by: big-o-bob on 12 May 2009, 13:49:49

Hi

Having just changed oil cooler, the car was running fine.  It's been nearly a week now since I changed it and it's started running lumpy.

It only seems to do it around tickover and most noticable when first setting off ot low revs - very lumpy and juddery...It seems to run fine, other than tickover and first setting off.

On tickover, the revs fluctuate and it actually cuts out sometimes.

Any idea's apprieciated....I'm starting to wish i'd never bought it now...if it was'nt for this forum, i would have got shut by now :( :y

Title: Re: Running lumpy?
Post by: Omega man 2 on 12 May 2009, 13:52:01

Paperclip it first of all :y

Second, try cleaning the idle control valve :y

Title: Re: Running lumpy?
Post by: big-o-bob on 12 May 2009, 14:30:23

Thanks.

I just tried the paperclip test.  Got the following..

74 -74 - 74
59 - 59 - 59
81 - 81 - 81

I'm not sure if i've done it right, or if the list is complete.  I will try again and list anymore tht may apear.

Thanks again

Title: Re: Running lumpy?
Post by: big-o-bob on 12 May 2009, 14:47:16

Quote

Thanks.

I just tried the paperclip test.  Got the following..

74 -74 - 74
59 - 59 - 59
81 - 81 - 81


Thanks again

This is the full list...

74
59
81

Any idea's on what the codes mean please.  I can't seem to find a list on here.  Thanks again :y :y :y

Title: Re: Running lumpy?
Post by: doz on 12 May 2009, 15:20:01

try looking here

http://www.omegaowners.com/forum/YaBB.pl?num=1160152415

Title: Re: Running lumpy?
Post by: Omega man 2 on 12 May 2009, 15:20:25

Quote

Quote

Thanks.

I just tried the paperclip test.  Got the following..

74 -74 - 74
59 - 59 - 59
81 - 81 - 81


Thanks again

This is the full list...

74
59
81

Any idea's on what the codes mean please.  I can't seem to find a list on here.  Thanks again :y :y :y

74   Mass Air Flow Sensor Voltage High
59   Intake Manifold Valve 1 Voltage Low
81   Injector Valve 1 Voltage Low

Title: Re: Running lumpy?
Post by: Omega man 2 on 12 May 2009, 15:20:53

Snap ;D

Title: Re: Running lumpy?
Post by: big-o-bob on 12 May 2009, 15:49:28

Cheers, very helpful

Could the problems be related.  I mean could one fault be causing all three codes?

Any idea's on what I need to do?

Where is the MAF sensor located?

Thanks in advance :y

Title: Re: Running lumpy?
Post by: big-o-bob on 12 May 2009, 15:56:44

Could it be a possibility that the lower manifold electrical connector block my not be plugged in properly (from when I removed the lower manifold)? :D.

Just a thought....

Title: Re: Running lumpy?
Post by: Omega man 2 on 12 May 2009, 15:58:15

The MAF is the second sensor along the intake pipe :y

The problems could well be realated and sounds like whats causing the poor running, but electrics are not my strong point I'm afraid  :-/

Title: Re: Running lumpy?
Post by: big-o-bob on 12 May 2009, 16:00:36

Quote

The MAF is the second sensor along the intake pipe :y

The problems could well be realated and sounds like whats causing the poor running, but electrics are not my strong point I'm afraid  :-/

Thanks mate, you've been more than helpful. :y

Title: Re: Running lumpy?
Post by: doz on 12 May 2009, 16:10:13

Hmmm. The injector valve is the one what is throwing me here. The other two could be related they are very close together but the injector harnes is right at the back under the plenum. Your gonna have to take the plenum off to check that one. As for the  other two check the plugs first then pop the wiring out of the plastic cover which goes across the front of the timeing belt covers. I've just had to replace the ecu loom on mine so know where they run all the wires now. ...... ...... Wish I didn't have to know  :-[

Title: Re: Running lumpy?
Post by: ngrainqey on 12 May 2009, 17:25:19

iv got some spare injectors/intake manifolds :P

Title: Re: Running lumpy?
Post by: big-o-bob on 12 May 2009, 19:29:13

Quote

Hmmm. The injector valve is the one what is throwing me here. The other two could be related they are very close together but the injector harnes is right at the back under the plenum. Your gonna have to take the plenum off to check that one. As for the  other two check the plugs first then pop the wiring out of the plastic cover which goes across the front of the timeing belt covers. I've just had to replace the ecu loom on mine so know where they run all the wires now. ...... ...... Wish I didn't have to know  :-[

Thanks mate....I am gonna take the plenum off to check the wiring harness connector on the lower manifold etc...first...

I will then look at the other possibilities.  I just hope it's a loose wiring connecter :-/ :y

Title: Re: Running lumpy?
Post by: big-o-bob on 12 May 2009, 19:30:45

Quote

iv got some spare injectors/intake manifolds :P

Thanks mate...If I can't repair, I will keep you in mind.

Thanks again

Title: Re: Running lumpy?
Post by: big-o-bob on 12 May 2009, 21:26:52

Problem now solved.

What a plank I am :D

I had infact, not plugged the injector connection in properly after removing to replace the oil cooler.

I have just removed the plenum (I am fantastic at this now), and plugged it back in.  

I have not had chance to do another paper clip test yet (It started getting dark), but I suspect that it will have cleared at least 2 of the codes.  as for the MAF sensor code - if it is still on, I will probably be back later.

The car now runs a smooth as a nut, so hopefully no codes will be showing now.  

Thanks everyone :y :y :y