Background: Lexus/550 mod, AFPR, Walbro fuel pump, HKS BOV recirculating, complete 3 inch exhaust from turbo to muffler (TANABE CAT-back).
After changing old engine parts and setting the timing my idle issues with missing and sputtering have gone away.
Using a wideband oxygen sensor helped me to eliminate some of the backfiring.
I struggled with these issues for about a year now - the car ran but missed at idle and backfired between gears.
My questions:
Is it normal to hear what seems to be a muffler explosion? For example, it happens when I tap on the gas peddle when the car is running. Isn't this just back-pressure ? The sound is hard to describe typed in like this.
What PSI should my vacuum be? It is at 18 PSI at operating temperature. I thought 20 PSI was normal.
After changing old engine parts and setting the timing my idle issues with missing and sputtering have gone away.
Using a wideband oxygen sensor helped me to eliminate some of the backfiring.
I struggled with these issues for about a year now - the car ran but missed at idle and backfired between gears.
My questions:
Is it normal to hear what seems to be a muffler explosion? For example, it happens when I tap on the gas peddle when the car is running. Isn't this just back-pressure ? The sound is hard to describe typed in like this.
What PSI should my vacuum be? It is at 18 PSI at operating temperature. I thought 20 PSI was normal.
