5ktq CIS problems still > Update

[John Forbes]

Ok so I replaced the ball of rust (a.k.a fuel accumulator) and still had pressure problems, then after fiddling with everything for 5 hours I noticed the hood light was dim. Battery was mostly dead, doh! So I charged it up and got pressure in the area of 4.5 bar. Then I lifted the meter plate and all 5 injectors worked great, so I put it all back together (this is comming on 4am yesterday) and got the car running, evne drove arround the block. It didn't miss at all, but did seem a bit slugish. My opinion of slugish is a bit warped though getting out of my last 300hp 5k and now getting into a stock one. Anyway it ran seemingly ok. So today I finished buttoning it up, went to DMV and got it registered and got a tag so I could go on some nice long test runs to feel it out. I left the pressure gauge on and tucked it under the windshield wiper so I could keep an eye on it. While driving the gauge read about 3 bar, but the car ran fine. Then about 10miles down the road the fuel pu!
 mp started to get really loud, the presssure shot up to 6bar, and the car started dropping cylinders at increasingly low throttle positions. The pump sounded to me like is was starving for fuel, but the gauge is correct and read 3/8ths of a tank. What was really wierd was the pump sounded like it was surging, the best way to describe the sound was like a jet ski running wide open and going over a series of waves. I pulled over, shut the car off and sat for a second then put the jumper in the FP relay and turned on the key. When the pump turned on it sounded fine, so I removed the jumper, restarted and continued on my way back to the shop. Another mile or 2 down the road it happens again, this time I just shut the car off, sat for 5 minutes, and continued on my way with the car runing fine and the pump making no noise. Then again another 2 miles down the road same thing, shut it off, waited, restarted and it was fine.

The only thing I can think of is theres something lurking in the bottom of the tank thats getting sucked onto the screen, then when I shut it off the object is floating away, only to get sucked up again eventually.

Also before I did my test runs I did a flow test. Test before the filter filled my 500cc cup in about 7 seconds, but the return did 500cc in 23. Spec as per Bentley is 750cc in 30 sec, reduced in my case to 500cc in 20 sec since I only had a 500cc container. I think at this point the battery was a bit low, so I'm going to recheck the flow when I get back from vacation on Monday.

-Cody