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Discussion in 'Shiny Things' started by a1fa, Mar 12, 2012.
I'll put a rush order to get those fuckers... just need to know what distributor to get...
Mechanical dist and get rid of the points . Pertronix ?
I'm not sure how the L-Jet system could have fried yoru points. The distributor should be a mechanical with vacuum advance and the points opening and closing are controlled mechanicly by the distro. I used to eat condensers on my bus until i found a short between the condenser and the body of the distributor.
Have you put a voltmeter on your ECU to ensure the thing isn't fried?
Swapping to carbs usually requires yanking the gas tank and modifying it to eliminate the high pressure gas return lines.
As posted on another forum:
Unfortunate accidents happen, sometimes due to ones own lack of diligence and foresight, and lack of experience.
You always learn the best from personal mistakes.
The following is a list of known bad parts:
- The Federal ECU - smoked. $100-$499.
- Wiring Harness, salvageable - fused pins, melted wires. $20-$350.
- 009 Distributor - melted. $100.
- Pertronix - melted. $70.
- Double Relay - smoked. $79
- Several Connectors - melted. $0.25
Learning from your own mistake - priceless.
This afternoon I spent some time cleaning up all this mess, and removing the failed components, and plotting the placement for Microsquirt.
I re-tested the rest of the electrical components, and all of the injectors ohmed to spec.. . I will be re-using them.
The following will be the new EFI layout:
Microsquirt will be inside the van under the bench away from heat, water, hands, and other things.
Pink - Relay 1 - Starter Relay
Purple - Relay 2 - Fuel Pump Relay
Red - Injectors - 4 individual pairs
Orange - Coolant Temperature Sensor - Custom Fit via adapter to CHT
Green - Intake AIR Temperature Sensor - Custom Fit into the intake plenum where EGR used to connect.
Yellow - GM 3 wire MAP Sensor
Blue 1 - Vacuum line from throttle body to MAP
Blue 2 - Vacuum line from intake plenum to Fuel Pressure Regulator.
The airbox will be replaced with a "cold are intake" piping with a filter from one of the "tuner" cars.
I'll probably (have to) re-use the AUX AIR REGULATOR for idle. Although idle air stepper motor could be machined somewhere into the throttle body....
$380 for the microsquirt kit: ecu w/ 4 injector terminals, wide band o2 sensor, coolant temperature sensor, wiring harness, relays, fuse, serial cable...
$50 for the MAP sensor,
$20 for additional connectors, and shrink tubing.
$20 for cold air intake.
Approximate Total: $470.
Aren't you going to run into problems with this setup ?
Have not been down that path yet, so would not know... What are you thinking?
Custom building an FI system ? I see people doing it , but with a lot of pain . Why ?
no pain in building it ..
Pain in mapping it...
Time is money .
Ok, I gotta ask. What in the world did you do?
I don't know what caused the original issue, and I can only suspect at this time that the ECU was on its way out. One thing is for certain, it is fried now for sure. I unplugged the ECU cable with the ignition on. It would not have been so bad had the pins not touched.
If they have a good starting map... And some seat of the pants tuning.
only about an hour dyno.
Wide band O2 will help out a lot. And a good five gas analyzer ...
Best thing he can do is find a guy local, who is really good with mega squirt . There is a computer geek here who has quite a few cars running around on mega.. some as high as 800 horse,..
He nails maps out of his head almost dead on...
I can't offer you any advice on how to fix the problem(s) with your van but I like they way you roll. Keep at it, you will get it.
Good news friend. I have found the problem. The ECU has gotten soaked wet and corroded a bit. Multiple paths on the circuit board looked to be damaged by oxidation.
No capacitors appear to be blown.
We may be back in business.
IT will never work.........
Don't get discouraged - I for one think that EFI is still the way to go. My 1.9 wasserleaker always ran like a watch, despite the lack of oil pressure or coolant. And if you do away with the stock system, the feedback loop and self-tune on a megasquirt will do in short order what would take countless iterations with carbs. Technology can be scary, but only because it's different.
How did the ECU get that wet?