Rick X Joaquim

Has anyone ever experienced timing pulling when at high revs?
i experienced tonight what might be timing retarded at high revs. it felt hesitation and mildly cutting off the gas. I suspect that the car has been running more advanced timing due to a lower ambitient temperature but when asking for higher demand, it experienced knocking and thus pulling timing. Never had this happened during hot summer days.
Currently having a EC v7.

PeterA90

EC v7 is on ragged edge for pump gas for some cars. Throw in an octane booster or blend in a few gallons (less than 5)of e85 for octane bump

deadlyvt

You say it’s fine if the ambient temperature is hot? Could be a misfire too, so you have any data logging? Any codes popping up?

Rick X Joaquim

No codes so far. Car runs fine on normal driving. At high rpm is like choking on and off.

PeterA90

Could also be the fuel pump... was the car driving fine when you first got the tune? When’s the last time you’ve done plugs or o2’s?

Rick X Joaquim

I loaded the stock tune and see how things goes.
All fuel pumps have been replaced due to similar symptoms that i had a year ago. Spark plugs replaced more than a year ago when had the headbolt job done.
Honestly, these problems come and go are getting frastrating.

PeterA90

Does it do it on stock tune?

Rick X Joaquim

So far on stock tune no issue. I suspect is pulling timing on a rather advanced tiing set up on cooler days. On hotter days, the timing have been pulled to begin with so no knocking. Just my suspects until i can confirm it with some fuel booster.