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Idle adjustment screw location 1.9 petrol

Posted: 08 Jul 2023, 12:43
by HuwLizzievan
Hi could anyone help me locate the idle adjustment screw in a 1987 1.9l petrol T25 please. RHD

Re: Idle adjustment screw location 1.9 petrol

Posted: 08 Jul 2023, 14:50
by Mocki
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Re: Idle adjustment screw location 1.9 petrol

Posted: 08 Jul 2023, 15:32
by HuwLizzievan
Thanks Mocki. I just had it tuned (to reduce CO for MOT) and the mechanic adjusted it too lean, hence stalling lots. Mechanic now ill and can't rectify and we are just about to go on a long trip so i need to adjust the mix. Thank you.

Re: Idle adjustment screw location 1.9 petrol

Posted: 09 Jul 2023, 12:03
by Aidan
check the brake vacuum hose that comes off the left side of the manifold isn't perforated as that will screw up the emmissions/adjustment/over compensation, if you spray easy start/brake cleaner/other fuel source on hose with engine running revs will rise if hose is pin holed as fuel is drawn in with the air, common problem on old braided reinforced hose, can make adjustment of carb to spec difficult/impossible; iirc HC's rise as CO comes down usually due to right side of cylinders running too rich

Re: Idle adjustment screw location 1.9 petrol

Posted: 10 Jul 2023, 10:57
by HuwLizzievan
Thanks Aidan