Fuel injection relief here!

[Bobnotch]

Tram, will this help?
http://classicvw.org/gallery2/v/Fuel-Injection-Manual/
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Bob 65 Notch S with Sunroof
71 Notch ...aka Krunchy; build pics here; http://www.thesamba.com/vw/forum/viewtopic.php?t=240540 -tear down
http://www.thesamba.com/vw/forum/viewtopic.php?t=249390 -been busy working
64 T-34 Ghia...aka Wolfie, under construction... http://www.thesamba.com/vw/forum/viewtopic.php?t=412120

[Tram]

[Bobnotch]

[rcutter]

Hello! the past few weeks my bus has been flooding at higher rpms usualy around 35-45 rpm. I was told buy a friend to check my fuel pressure regualtor. As I understand it the constant fuel pressure on my 78 Westy should be 30-35 psi and it should be maintainde after shut down. My fuel presure was above 35 psi and upon engine shut down presure stayed at forty. Is this the result of the presure regualtor going bad or do I need to look some where else? Is there a way to adjust the fuel/air ratio on my efi system? Thank you for any help you can give me.

[Tram]

[OB Customs]

[Tram]

[OB Customs]

[Tram]

[rosevillain]

The advance plate on my AB distributor was stripped out, so I replaced the distributor with an AL. I noticed that the performance was lacking, the economy suffered, and it started to develop a miss. I put a different advance plate on my AB distributor, and it ran much better, for 30 miles. On my way home from work (35 miles), the miss came back, and the engine died at stops.

When I got home, I checked the timing, point gap, and wiring; all were in decent order. As I was doing checks, the engine would intermittently die. Then, it wouldn't start. Replaced the ECU, and it ran. Changed it back, and it wouldn't start. Put the new one in and it fired right up.

This is my fourth ECU in as many years. As these things never die, i will gladly send anyone my three, for your three.

Any ideas/ takers?
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[Tram]

[raygreenwood]

Yep....its not the ECU's....its what is supplying them (ground or power)...that is off. Ray

[special_k]

new squareback owner 56k miles. Fuel lines all new vacum lines replaced. Problem seems to be with fuel pressure regulator on firewall. I have owned this car for 4days it went over the altamont in california to come home had to adjust points wouldnt make it over the hill. It chugged so we thought it was just points we are new to fi.
Since then have discovered all the injectors were leaking cut pressed on line off taking care not to cut plastic and replaced all fuel line to and from injectors.
Found some and or all vacumn lines i could see and replaced. Replaced points. Engine stumbles and has small backfire on pass side. Unknown cause. Seems to be that when i remove and plug the pressure regulator under drivers side firewall it seems to run beyter. Still had small pop on passenger side. What can i troubleshoot?

[rosevillain]

Basics first.

Check the ignition. Point gap, timing, plugs (don't use platinum), advance mechanisms.

Check for vacuum leaks. This includes all vacuum lines, the intake manifold to plenum hoses, and the intake manifold to head connection. Between the head and the intake manifold, there should be a bakelite spacer and on either side of this spacer should be cardboard gaskets, not the metal ones.

Check all of the wire connections for the fuel injection. One bad wire can f you.

Check your fuel pressure with a gauge.

Check to see if the last letter on your ECU(electronic control unit-inside of the right rear fender-like 20 wires) matches the last letter on your MPS(manifold pressure sensor- mounted to the inner right rear fender, insideof the engine compartment-4 wires- I think you're calling this the pressure regulator?) and that you have the correct TPS(throttle position sensor-two, four, or five wires) for your system.

What year is your car, is it automatic?

http://classicvw.org/gallery2/v/Fuel-Injection-Manual/

This book will help with compatibility.

Good luck.
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[rosevillain]

[special_k]

thanks jimmy
no its a stick
we replaced all vacumn we could see find.
Will reverse fuel pump to clean out any crap. Will check wires. Will replace filter.
This car has 56k miles on it. It sat off and on for 2 years.Stamps in owners book said oil changed reg at berkey-lees in albany last oil change there was in 1975 @ 43k miles here many years later second owners who bought it from p.o. Said she was a sturdy lady who didnt drive it much.they owned it and hardly drove it. Seems complete.
Im posting this from my phone.. Didnt mean to hijack this post cant figure out how to start new thread. The car is a 1968 Square.

[Tram]

[special_k]

The 68 Square is running again OMGOODNESS IT WAS A ROUGH TWO WEEKS!!
it ended up being a bad cap rotor and some relay problems.
It was really and truly one day away from carburators. My boyfriend sold his only car to buy this one. I have put 1400 miles on my 65 square in 2 weeks. It is my only car right now. The relay under the dash was rattling. I read in this forum that when replaced prob resolved We called the closest import shop who regularly gets parts WRONG and told her we needed the relay for power for fi. It was wrong. Boyfriend drove car to work had to tow home he switched relays back on side of road before calling me and was incorrect then with the clymer,the bentley and the samba diagrams promptly got the wires wrong. The one under the seat was untouched but one of the POs had changed and spliced on the column and we got very confised. So thank god for one patient brother(real kin)and all of OVP. Old Volks People I will answer withe the information you requested tram. And thanjs rosevillian for your fast help too!!!
We will definately be at the next show!
More info to come. THANKS GUYS!!!

[Mason]

I have decided to go back to F.I. after my carbs quit working. Luckily the car (68 squareback) came with all the original fuel injection pieces but when they secured the harness parts of it were on the exhaust rendering it badly burned and broken in some spots. Anybody got a good "A" harness lying around?

[Tram]