LarryJoe
10+ Year Contributor
- 364
- 9
- Feb 10, 2012
-
Davisville,
West_Virginia
So today I was out doing some pulls tuning my car. It was about 90 degrees out and I had a tad over 1/4 tank. Well I first started at 22psi and had a afr around 11-11.3 to redding every pull but I couldn't get rid of knock unless I took my timing down further than I wanted. As each pull went one after the other i was noticing my pump getting louder and louder. To a point where it was so incredibly loud people would look from their cars with the windows up and notice the pump whine. So I decided to compromise and turn it down to 19psi. I did a pull with good afr's and no knock until above 6k rpm when it randomly spiked into the upper 12's afr. Did it on 2 pulls before I took the car home. I let the car cool down for quite a few hours and started it and the whine was going. Did I just overheat the pump or should I look into replacing it completely? It's a Walbro 190 btw.