1979 super beetle fuel injection problem

[Eric Shelton 01]

Have a 79 super here. Working on this for someone, he replaced the fuel injectors, distributor with electronic ignition, fuel pump, coil, double relay. Here is where its at after ive messed with it. It will not start with the ground for the double relay hooked up at the battery or unhooked but if i tap it on and off at the battery it will run, not good but will. Im no expert on these fuel injection engines so im stumpped. I will include a couple pics of 2 things that are not hooked up in the engine compartment just in case that could be an issue. Any suggestions would be appreciated.

[infiniteLoop]

when you are taping it ,you are forcing the relay to do what the low amp circuit should be controlling.

[Eric Shelton 01]

[busdaddy]

Unfortunately shooting the parts cannon at it has now disguised the original problem, I hope you kept all the old parts since alot of "new" stuff is trash.

The first thing I want to see is a picture of the top of the alternator showing all the way from the shroud to the battery terminal, I have a suspicion.....
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[Eric Shelton 01]

[Eric Shelton 01]

[busdaddy]

Gotta see the terminals on the alternator and what wires are on there, or at least a good description of what's on what.

What's the spade terminal laying on the tin in the lower left by cylinder #4, is the temp sensor #2 connected?
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[VW_Jimbo]

Is that a disconnected head temp sensor by #4?
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Jimbo

There is never enough time to do it right the first time, but all the time necessary the second time!

[Eric Shelton 01]

[Lost69Convertible]

[busdaddy]

Agreed, that fuel line looks super scary, replace every single one before getting in much deeper, a fire only takes seconds to get out of hand.

If the TS2 is disconnected it'll overfuel, tapping the ground on the battery terminal would run the injection intermittantly reducing the mixture enough to sort of run. Forget about the alternator for now and hook up that temp sensor.
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Rust NEVER sleeps and stock never goes out of style.

Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
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[Eric Shelton 01]

[busdaddy]

[Lost69Convertible]

To be sure it’s the TS2 connection:

Look up the TS2 pin# on the ECU in Bentley.
Pull the connector off the ECU.
Check continuity from the spade to the ECU connector.
_________________
1956 Beetle Ragtop: My Father's car
1969 Beetle Convertible: My first car. I loved it, I lost it, and I never got over it.
1979 Super Beetle Convertible

[VW_Jimbo]

Yes, that loose flat blade connector is the one to tie into. It had a plastic cover over it. You can cut it off, install a new female end, install a new inline clear connector for VWs, and connect the temp sensor to it. Should make a world of difference!
_________________
Jimbo

There is never enough time to do it right the first time, but all the time necessary the second time!

[MuzzcoVW]

Also you may want to test the temp sensor before you hook it up. As stated it's critically important to be connected. None of mine will run with it disconnected. And yeah...change all those fuel lines ASAP! Let us know how it goes.

[Eric Shelton 01]

Ok fellas ill try those things listed midweek when im back at home. As listed this is not my car, i just offered to try to help this guy out. He got this bug from his in laws, when he got it i guess the grandkids had gotten under the hood and unhooked many things. Im an early bug guy, not used to all this extra "STUFF" LOL under the hood.

[MuzzcoVW]

Another bit to keep in mind. The L-Jetronic fuel injection system hates vacuum leaks! Even one small hose disconnected can cause starting/running issues.

[Gr0unded]

[MuzzcoVW]

The connector for the temperature sensor should come out of the harness like 6 in above the driver side injectors. Just trace up the injector harness and you should find the single wire with an inch and a half or so connector block...long skinny shape