Running out of fuel at WOT

[PacecarTA]

i retested mine again and sent the vid to chuck
 at under 12v (engine off on a weak battery )
alky tetser maf simulator at 22-30 psi ,
tested with a single m15 nozzle and 100% methanol
gauge read 150psi with only a couple psi fluctuation 

my personal settings were at
gain knob  5.5 ,
inside the box .. turnon at 10:00 (8-9psi) initial at 11:30 ( i run two M10nozzles)

[84 BuickGNYorkPA]

Showing 8.65 volts at the box under the dash, the positive wire ohm's out but the negative wire doesn't, will look at it more tomorrow.


Chuck

[Steve Wood]

Sounds like it's going to be a cheap fix!

[84 BuickGNYorkPA]

Volts going in to the controller 12 volts, volts going out with the reastat turned to max (alky flow knob) 8.6 and alky flowing back into alky tank with pressure test kit. Next unhook pump from the system, 12.0 volts coming out of the control box with reastat maxed out. Next test, hook the pump up direct to the 12 volt battery, battery dropped to 11.7 volts, pump pressure = 100 psi.


Chuck

[Steve Wood]

If I understand  correctly, you should see a lot more than that

[PacecarTA]

where are you grounding at

the pump runs by regulating the ground with a pmw controller
reading 12v at pump is one thing but if the ground is  weak the pump will never run well with load

check your grounding  and your connections to pump and at the controller 
i use the 10mm grounding bolt on the lower edge of the dash just beside the courtesy bulb where  the main dash harness ground is
 good idea to run a ground (12gauge) from there to the fender by battery

12v across a meter doesnt mean much unless you read it using the ground at amperage
you can have a a wire connection thats  shows good on a meter when tested with milliamp of the tester battery but when hit with a load is no good 


i usually have the alky tester (and ignition tester)  with me at the meets
if you make it out to Cecil (Northeast Buick nationals /magna car sho)we can test it with my setup   , if not there maybe at Kirbans open house

[PacecarTA]

 ill tell you this chuck
as  much as i believe your alky pump is running lower than normal it was running

what i dont see is how with 85psi of alky you were off on fueling  by over 25%
the pump wasnt and currently isnt capable of displacing that much fuel even with duals

theres more to this than we are seeing unless you were pushing the car and getting nothing from the pump

im sure youve heard from murphs loggings to keep the bucket full or it will cavitate (wont happen on a dyno of course) 


i would be looking into the SD program a little more and look for a setting that lowered the injector duty, or for misfire

[daveismissing]

So alkycontrol is PWM lowside switching?
THAT will take some education for the regular user to troubleshoot.

[Steve Wood]

I think alky control suggests that the pump be rebuilt every couple of years

[84 BuickGNYorkPA]

Paul,
I ran a ground wire to the firewall, for the tests, (borrowed the one hooked to the wideband and scanmaster, made no difference) which is a ground kit from the block.


Under the dash is a nightmare, wires from the alkycontrol kit, scanmaster, wideband, knock sensor, A/F ratio gage, turbo/vacuum gage, it really needs a dedicated power and ground strip. Also been having issues with the wiper fuse socket for many years. Thinking I should find/buy a  new fuse block, or what ever that thing is called that holds all the fuses and redo it all. 


At this point I'm sure that the pump is bad, and possibly the controller, so now I have two pumps, one that leaks and puts out 65 and one that puts out 100 wired direct to the battery. I spent the extra money last year to buy a new pump thinking a new pump should give me another 3 years like the 1st one, well I got a year and a half out of it anyway.

[84 BuickGNYorkPA]

Update: The root of the problem was a bad Innovative LC-1 wide band. Just got around to installing the new PLX system yesterday that I scored on ebay for about $100 a few weeks ago, what a difference. Started the car a/f solid as a rock at idle, looked at the vacuum gauge and it wasn't moving. Thought that I must have knocked the hose off of it, so I tap the gas pedal and it moved, car idled smooth Looking at the SD2 ver 1.1 chip on the bench and thought well, days going pretty well so might as well go for it, and more good news, car is back,  both Alky pumps are packed and ready for shipment tomorrow back to Julio, so the boost is turned down to 18, but after a couple of test runs, the tune is very close already, pretty sure that if I put that 95 psi alky pump back on, I could be back to 25 lbs boost, but it goes in the USPS system tomorrow, hope to see it back in about 3/4 weeks. Car does not go lean anymore, bad O2 system = bad input = bad output = crazy O2 readings?

Chuck

[Steve Wood]

wide bands have made me appreciate open loop chips!