idling @ 1500rpm after using carb cleaner

[fulvia]

I had a roughish idle, which moved +/- 100 around the 900 mark which fluctuated more when hot and would drop quite low.

So I've sprayed carb cleaner into the system while blipping the throttle and also sprayed it down the thinner connecting hose, (the one which joins the large hose underneath), as well as into the throttle itself.

Now there's a stable idle at 1,500 rpm both when hot and cold.

Just wondering, have a got rid of any gook and now simply need to reset the throttle screw, or has the carb cleaner created a leak?

I've looked at the page on Clark's garage, and if I adjust the idle I need to bypass the ISV, by installing a jumper on the diagnostic plug - doesn't say where it is though???

Would it be a good idea to spray silicone spray on different hoses to check for leaks?

Also, where is the idle speed adjuster valve on an '86 Lux?

 

[fulvia]

anyone?

 

[Mark_Bennett]

I'd think it's because all the gunk that was restricting the amount of fuel getting through has now gone.

But... Isn't this fuel injected? Wouldn't a bottle of fuel injector cleaner have been more appropriate? Where did you spray the Carb Cleaner?

 

[edh]

I didn't think there was an idle speed adjustment on the 2.5? - you may have a vac leak somewhere (Just checked the US Haynes that says it's a dealer operation only)

The Clark's procedure is for turbos

btw - I think I must have seen you on Sat am at PH - you had the Gold Hyundai loan car?

 

[TTM]

ORIGINAL: edh
I didn't think there was an idle speed adjustment on the 2.5?

The idle speed stabiliser was fitted to all oval dash cars.

 

[edh]

I mean the adjustment screw on the throttle body - it's not there on the n/a 8V's

 

[fulvia]

ORIGINAL: Mark Bennett


But... Isn't this fuel injected? Wouldn't a bottle of fuel injector cleaner have been more appropriate? Where did you spray the Carb Cleaner?

yes yes - I think it was Wynns or something but it was for both fuel injection and carb engines - I think 'carb cleaner' is a bit of a generic term for it -
Sprayed it in the entrance of the AFM, and down the connecting hoses to the large rubber hose.

 

[fulvia]

ORIGINAL: edh

btw - I think I must have seen you on Sat am at PH - you had the Gold Hyundai loan car?

that was me!!
I wish I'd had a proper chance to say hello! Your car looked very classy!

 

[fulvia]

ORIGINAL: edh

I mean the adjustment screw on the throttle body - it's not there on the n/a 8V's

I think it's here, on top, (and I understand it's on the side of the throttle body on turbos)

and on mine it's a hexagonal head rather than a philips screw - possibly 6 or 7 mm

But I just need to find out where the ISV is - On S2 cars it's somewhere underneath the intake manifold - but I can't find it on mine.

 

[edh]

Ok - I'm thinking back to my 924S & didn't think there was anything there. So how do you bypass the ISV? - Is there a diag socket on the 8V? On the turbo it's up at the rear of the engine bay, nearside.

 

[edh]

ORIGINAL: fulvia

ORIGINAL: edh

btw - I think I must have seen you on Sat am at PH - you had the Gold Hyundai loan car?

that was me!!
I wish I'd had a proper chance to say hello! Your car looked very classy!

I'm a much too regular visiter to PH [] - I should get loyalty points...

 

[mr brightside]

ORIGINAL: fulvia

I had a roughish idle, which moved +/- 100 around the 900 mark which fluctuated more when hot and would drop quite low.

So I've sprayed carb cleaner into the system while blipping the throttle and also sprayed it down the thinner connecting hose, (the one which joins the large hose underneath), as well as into the throttle itself.

Now there's a stable idle at 1,500 rpm both when hot and cold.

Just wondering, have a got rid of any gook and now simply need to reset the throttle screw, or has the carb cleaner created a leak?

I've looked at the page on Clark's garage, and if I adjust the idle I need to bypass the ISV, by installing a jumper on the diagnostic plug - doesn't say where it is though???

Would it be a good idea to spray silicone spray on different hoses to check for leaks?

Also, where is the idle speed adjuster valve on an '86 Lux?

Same happened to my 924s when i cleaned out the throttle body. Now it's adjusted back down it's exhibiting ISV problems and sometimes stalls when cold, i did the override thing like it said in the clarks guide but no amount of tweeking will seem to sort it. Going to change the ISV this winter.

BTW don't quote me on this but i wouldn't spray carb cleaner into your MAF again.

 

[mr brightside]

ORIGINAL: edh

Is there a diag socket on the 8V?

Mine's in the corner adjacent to the passenger door mirror under a black plastic cap.

 

[fulvia]

ORIGINAL: mr brightside

BTW don't quote me on this but i wouldn't spray carb cleaner into your MAF again.

I've since read that there is a material which seals the butterfly flap and that cleaner will destroy it! Wonder if this is what has happened. Yet to try the idle adjust procedure though.

 

[fulvia]

ORIGINAL: edh

I'm a much too regular visiter to PH [] - I should get loyalty points...

I guess the car is worth the good treatment though!

 

[Mike_Pollock]

Hi Ian

Think I may have a spare unit if you want to try a swap.

Mike

 

[fulvia]

Thanks Mike,

I think I'm ok. Had my head in the bonnet after work and located the diagnostic plug. It had foxed me because it had been replaced upside down, so, it didn't look anything like the picture in Clark's Garage manual.

The screw required a few turns, but its down to 1000 now. Will fine tune when the operating temperature is correct.

Just the hatch to sort now! plus paint, then i'm there!