Ok before I lay out what the car is doing let me give you a quick update on the past couple of months.......
Back in April I took the car to Reynolds for the event....prior to the event the car would break up real bad when i got into the boost. To make a long story short I found that it was breaking up to due it being to rich.....I leaned it out via the chip and the problem went away. The reason it was too fat is because I increased the size of my fuel feed line but not the retun.
Anyway went to the track car ran good other than being real rich, still had not increased my return. I ended up maxing out the chip on the fuel negative side.....either way the car pulled great with zero knock and pulled hard until I blew a head gasket......I had 116 in the tank and only 22psi of boost but I contribute the gasket failure to real bad knock on the street trying to get the tune right.
Ok so the present I just freshend up the engine,new rod and main bearings, fresh rings oil pump kit and gaskets. the car has been running for two weeks. On very light throttle the car will spit buck and pop like it is dropping a cylinder. That seems to go away once the car gets warm. After it is warm it seems to be fine under normal driving conditions until you get in it. At times it will pull great zero spit or sputter and zero knock however it does seem fat...820mv but still inconsistant sometime mid to low 700mv's. I did increase my fuel return line to a -6 but it is going into the factory hard line fitting on the fuel pump (may still be a restriction?) Other times I go WOT and it breaks up real bad somtimes with zero knock and sometimes with. Knowing the rich issue I had before I pulled out 10% of fuel and went wot....car pulled great zero knock.....made another pull this time no breaking up but detonation @747mv's and 4.7 knock??????
It is very inconsistant like that, I even say a few degress of knock a 820mv's and sometime zero knock at all.
Here is what I have checked please list anything you can think of I may have missed.....and I know I really need a PL but I have the car for sale and I am trying to not spend anymore money than I have.
Checked all grounds found a broken one made repair,check crank sensor for proper clearance. Checked ecu,chip and connections. checked all vacum lines. My O2 sensor cc look good, all other readings are dead on where they should be. I did have a quarter tank of 116 and topped it off with 93, I just read another post about bad fuel and I am not rulling that out.
What am I missing to check?
Sorry for the long post and thank you to those who have read it!
Back in April I took the car to Reynolds for the event....prior to the event the car would break up real bad when i got into the boost. To make a long story short I found that it was breaking up to due it being to rich.....I leaned it out via the chip and the problem went away. The reason it was too fat is because I increased the size of my fuel feed line but not the retun.
Anyway went to the track car ran good other than being real rich, still had not increased my return. I ended up maxing out the chip on the fuel negative side.....either way the car pulled great with zero knock and pulled hard until I blew a head gasket......I had 116 in the tank and only 22psi of boost but I contribute the gasket failure to real bad knock on the street trying to get the tune right.
Ok so the present I just freshend up the engine,new rod and main bearings, fresh rings oil pump kit and gaskets. the car has been running for two weeks. On very light throttle the car will spit buck and pop like it is dropping a cylinder. That seems to go away once the car gets warm. After it is warm it seems to be fine under normal driving conditions until you get in it. At times it will pull great zero spit or sputter and zero knock however it does seem fat...820mv but still inconsistant sometime mid to low 700mv's. I did increase my fuel return line to a -6 but it is going into the factory hard line fitting on the fuel pump (may still be a restriction?) Other times I go WOT and it breaks up real bad somtimes with zero knock and sometimes with. Knowing the rich issue I had before I pulled out 10% of fuel and went wot....car pulled great zero knock.....made another pull this time no breaking up but detonation @747mv's and 4.7 knock??????
It is very inconsistant like that, I even say a few degress of knock a 820mv's and sometime zero knock at all.
Here is what I have checked please list anything you can think of I may have missed.....and I know I really need a PL but I have the car for sale and I am trying to not spend anymore money than I have.
Checked all grounds found a broken one made repair,check crank sensor for proper clearance. Checked ecu,chip and connections. checked all vacum lines. My O2 sensor cc look good, all other readings are dead on where they should be. I did have a quarter tank of 116 and topped it off with 93, I just read another post about bad fuel and I am not rulling that out.
What am I missing to check?
Sorry for the long post and thank you to those who have read it!
