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Re: rochester quadrajet
Posted: Sat Apr 19, 2014 11:37 am
by bhm1712
with the highest rev achieved the gunson then allowed me to just tweak the screws until the flame was a lovely bright blue.
Re: rochester quadrajet
Posted: Sat Apr 19, 2014 2:09 pm
by thirdgen
i need to get one of those then i paid £2.80 plus vat each plug
next time i will use ebay should have done them straight away but i did the decals
Re: rochester quadrajet
Posted: Sat Apr 19, 2014 8:56 pm
by bhm1712
My procedure for doing it without the colour tune is:
Back off the idle speed screw on the throttle linkage until it's no longer touching the throttle actuator and so the throttles are closed. Then screw in the idle mixture screw on the right hand side until the engine almost stalls at idle - will run rough. Then screw out the idle mixture screw until the revs stop getting higher. This is a small rev change not hundreds of rpm. Then 1/4 turn back in. Do the same for the left hand idle mixture screw. Then set the idle speed screw to 800 ish rpm. Not too low or the oil pressure will be too low at idle
Re: rochester quadrajet
Posted: Sat Apr 19, 2014 8:58 pm
by bhm1712
Worth noting that if your engine stalls when you have backed off the idle speed screw that's usually a good indication the idle mixtures are not set right.
Re: rochester quadrajet
Posted: Sat Apr 19, 2014 9:03 pm
by SUPERCHARGEDGTA
thirdgen wrote:is that technical help
tpi rules
my tpi motor used to have its moments on hot days also. so do not rule.
lol
never had problems with mine or davids
just don't touch the throttle
Re: rochester quadrajet
Posted: Sat Apr 19, 2014 10:23 pm
by thirdgen
thanks ian i bought a color tune today it was perfect i altered it to see a change and put it back to where is was was well set up
Re: rochester quadrajet
Posted: Sat Apr 19, 2014 10:25 pm
by thirdgen
SUPERCHARGEDGTA wrote:thirdgen wrote:is that technical help
tpi rules
my tpi motor used to have its moments on hot days also. so do not rule.
lol
never had problems with mine or davids
just don't touch the throttle
my gta would not start from hot unless i gave it some pedal
Re: rochester quadrajet
Posted: Sat Apr 19, 2014 11:23 pm
by SUPERCHARGEDGTA
throttle position sensor not set right or fuel sensor issue, or faulty temp. sensor maybe
still would not want to go back to carb again
Re: rochester quadrajet
Posted: Sat Apr 19, 2014 11:34 pm
by bhm1712
I see mr Thirdgen has gone all anti thirdgen since owning a 2nd gen1
Re: rochester quadrajet
Posted: Sat Apr 19, 2014 11:39 pm
by SUPERCHARGEDGTA
he is getting old now
Re: rochester quadrajet
Posted: Sun Apr 20, 2014 8:59 am
by thirdgen
i love 3rd gens i will have another one day they drive so good. i nearly ditched my tpi for a carb when it played up
Re: rochester quadrajet
Posted: Sun Apr 20, 2014 6:26 pm
by SUPERCHARGEDGTA
both are fine when running right, both are a pain in the ring when they play up/don't run right
Re: rochester quadrajet
Posted: Sun Apr 20, 2014 7:32 pm
by bhm1712
Mines always a pain in the ring!