Author Topic: Idle problem 1981 GTV 2000  (Read 1061 times)

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fazersix

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Re: Idle problem 1981 GTV 2000
« Reply #30 on: October 18, 2020, 11:06:36 AM »
Carbs back on and first start up it ran and idled, ran like it had a fouled plug! Cleaned no 2 no change. Checked the fuel level it is at 27mm in the middle - I adjusted this on the bench using an old squeeze sauce bottle, gently squeezing to simulate 3lbs pressure which worked well!
Took some time to read and think things over then realised I had moved the carb sync screw during rebuild. Adjusted that and it is running pretty nicely, idling around 900rpm.
Now to tune the mixture and proper carb sync.

Update:
Had time to do the tuning, set mixture, using two gauge vacuum meters balance both ports in each carb and then then checked the carb to carb balance. Idling nicely around 900rpm and returning to idle after revving.
 
Test run, now revving sweetly and finally hits 6000 rpm.
Thanks to all who helped me on this post.
« Last Edit: October 18, 2020, 04:24:02 PM by fazersix »

carlo rossi

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Re: Idle problem 1981 GTV 2000
« Reply #31 on: October 19, 2020, 04:23:37 PM »
try and get hold off the 34mm chokes with 155 mains or 152mains with 32mm
current cars
red 83 gtv 2.0


previous cars
Red 76 1.2/1.5 alfasud ti
white 79 alfetta 2000
alfetta 74 1.8
escort Lotus twin cam
bikes
ducati 900 ss 1979
moto morini 3 1/2 sport 1975/6
Moto morini 3 1/2 valentini speciale 77 oh and a deltek rockhopper

fazersix

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Re: Idle problem 1981 GTV 2000
« Reply #32 on: October 19, 2020, 05:58:05 PM »
Hi Carlo,
The 34mm chokes (because I am running 155 jets with 32mm chokes ATM) are around $100 from Eurocarb and could be a pain to fit if stuck. If I am lucky I can remove them whilst the carbs are on the car!
The 152 jets are around $50 and an easy change.
Will the 34 mm chokes give a noticeable performance increase over the 152 jets?

Cheers

carlo rossi

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Re: Idle problem 1981 GTV 2000
« Reply #33 on: Today at 10:15:33 AM »
really it only picks up the top end from 5000rpm to 5500rpm
particularly if 155 jets  are too big
current cars
red 83 gtv 2.0


previous cars
Red 76 1.2/1.5 alfasud ti
white 79 alfetta 2000
alfetta 74 1.8
escort Lotus twin cam
bikes
ducati 900 ss 1979
moto morini 3 1/2 sport 1975/6
Moto morini 3 1/2 valentini speciale 77 oh and a deltek rockhopper