Car Problems

AndyJ

Afternoon guys,

I've posted on here before a while ago with this problem but i've still not resolved it. I'd appreciate some more help!

I've got a 2.2 Astra SRi thats had a few modificaions, including the DBilas inlet manifold. I've had the car since May and have always had this problem and it is getting more frequent.

Basically whenever i'm pulling up at lights, roundabouts etc after having driven for say ten minutes or so there is what seems to be a lot of vibration from the exhaust, it sounds as though its vibrating against the underside of the car and the car feels like its going to cut out (or blow up!) This problem is especially worse after i've been on the motorway (or been tanning it) and have driven at a reasonable speed for any length of time. When i stop and turn the ignition off then on again there is an extremely loud noise from the exhaust on start up, as though load of air has been forced through the system and it bangs loudly on the underside of the car. Kind of as though its the engine thats doing the moving and making the exhaust vibrate.

I have had the EML light on a few times but when i got it plugged in at my local garage there weren't any faults recorded as by the time i got it there they had been wiped off (something to do with faults only staying for so many number of ignition cycles)

Occasionaly the revs will idle up and down and the car will cut out, this is usually when i get the EML light on. This has happened about five times in the 8 months i've had the car.

I have removed the EGR valve, fitted the blanking plate and cheater. I have also had the throttle body cleaned out and the exhaust inspected. Now, the exhaust is blowing slightly over one of the clamps and i'm going to fit a new clamp this weekend however i can't see this being the cause of the problem. Other than that the exhaust is perfect.

Driving round town slowly etc ther car feels fine but when its given a bit of stick or i'm driving at higher speeds it sounds a lot different and feels like its going to blow up! cryb..

I've tried to explain everything as best i can but its quite difficult! Hope someone can shed some light on this for me.

thanks.

vocky

might be something like the spark plugs causing a lumpy idle notsure.gif

or the fuel filter dunno..

Daz

Occasionaly the revs will idle up and down and the car will cut out, this is usually when i get the EML light on

Thats the same fault as jamme was getting on his 2.2 after we changed the ported 2.2 inlet manifold.....since fitting the new 2.4 manifold and cleaning the mating surfaces it has been ok....

vocky

Daz said:
since cleaning the mating surfaces it has been ok....

the surface was slightly corroded :roll:

seems to be a common problem dunno..

jimmywrc2_2

try and spray sum thing round the manifold like carb cleaner or sumthing c if the revs go up or down c if that leaking dunno..

AndyJ

Thanks for the replies guys.
I've recently fitted new spark plugs but not a fuel filter. The car is overdue for a service but i can't afford to have it done yet. I can't see the fuel filter being the problem though to be honest. I think it may be a problem with the manifold if anything. Don't really want to be buying a new one seen as i've got the DBilas one at the moment. Does anyone know what sort of guarantee you get on them? This was already fitted when i bought the car, i've got all the paper work that goes with it.
Has anyone else on here got the DBilas manifold? I don't know a great deal about cars so was a bit worried about removing it incase i mess something up! Should it be pretty straight forward?

vocky

you don't need a new manifold, you need to clean the mating surfaces of the gaskets cheers..

Daz

My tickover played up a bit...but not as bad as jamee's...i reckon it cud be worth taking the manifold of having aclean up and then refitting it....

jimmywrc2_2

Daz said:
My tickover played up a bit...but not as bad as jamee's...i reckon it cud be worth taking the manifold of having aclean up and then refitting it....

same as i say try the b4 taking off worth a try !!!try and spray sum thing round the manifold like carb cleaner or sumthing c if the revs go up or down c if that leaking