Hesitation on carbs

[den912]

I have 2.2 T freshly rebuilt, it had webbers on it but there was hesitation when I accelerated, had the carbs rebuilt but still the same hesitation, I decided to bite the bullet and get a set of PMOs (I have them on my 914-6 and they're great) but I still have the hesitation ☹️, I didn't replace the linkage could this be the problem or could it be something else, getting desperate now it's ruining my driving experience

[Jack Stands]

Check your accelerator pump volume and ignition timing. You‘re probably going lean when opening the throttles.

[fizeus]

also check valve lash (ask me how i know)

[icarp]

I just sent you a PM, I just finished a set on a 71 targa
Maybe I can help
Ian

[proporsche]

as Jack said you have to check you acc volume of gas..of course timing it right is a must..then report

Ivan

[icarp]

Brian, just a few quick checks . What are the jets in the carbs ?
34mm chokes , f11 emulsion tube , 125 main, 150 air , 55 idle, 130 idle air , ect ,, this is all from the PMO company. The pump rod needs to have a very specific length adjustment . measure the length of the threads showing past the adjusting nut , post this with all the jet sizes you have
My quick guess is that you will need a idle air jet change from 130 to 120 or 110 and a pump rod adjustment. Are the PMO's new ? the may need a pump cam update .
Ian

[jpnovak]

check linkage balance L to R. If one side goes lean from improper linkage adjustment it will hesitate.

I have seen a few issues where the replacement linkage bars are not bent correctly resulting in arm length differences, This means that the arc travel is different L to R. Easy to correct with some careful measurements.

Make sure the balance is spot on before messing with the jetting. airflow issues will greatly mask the fuel delivery issues.

[proporsche]

also, do you have the carbs balanced?

Ivan