Recent Posts

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Meet and Greet / Welcome to our newest member DuedsDexQuado
« Last post by Yummi on July 23, 2021, 04:18:07 PM »
Hi DuedsDexQuado,

Tell us a bit about yourself?

Any cool projects on tap?  Prior experience?  

Do you have the winning lotto numbers?
2
Meet and Greet / Welcome to our newest member MyCreditDom
« Last post by Yummi on July 22, 2021, 09:57:16 PM »
Hi MyCreditDom,

Tell us a bit about yourself?

Any cool projects on tap?  Prior experience?  

Do you have the winning lotto numbers?
3
Chassis and Suspension / Re: DS a-arm kit information needed.
« Last post by Aprilfools on July 22, 2021, 01:36:11 PM »
i would like to know how they are getting the stock tfi to function with all the bypassns you described. i wouldn't believe that to work but somehow they have.

auto enrich ( ae) is like the accel pump shot in a carb. its done a few diff ways but in your case ( with a stock ecu) its done via the vam and or tps. that vam is a very early and poor version of a mass air flow sensor, (maf sensor). they do work but there not as a instant response as tps/map based. my megasquirt ecu doesnt use a maf but rather just a map and tps for ae.

as fabr stated above.....replace the tps and verify it operating the correct voltage range. that should help the stumble. beyond that, would have to know what/why whomever bypassed the tfi. if they truly bypassed it then there must be something else controller timing. i wonder if they went with a mechanical advance from the older carb version??
I bet you would be right.

I am surprised as anyone that this combo runs, not sure why they went this way either. Maybe a cheep way to get EFI on a VW? Not sure really.  I think you guys are correct on the distributor, we bought spare one at salvage yard for parts last fall and it ended up having the guts inside completely different.

The VAM thing is definitely not ideal, i just done know a way around it. I am hoping to get it to run good or at least decent and then figure out how to improve it. Or if not change it over to a blow through carb!
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Chassis and Suspension / Re: DS a-arm kit information needed.
« Last post by Aprilfools on July 22, 2021, 01:29:01 PM »
Sorry,I had it in my head you were running the Ford engine with VW controls but it's the other way around. I worked at a VW dealership in the engine/trans dept about 45 years ago. If the head to cylinder surfaces were not good we would lap them in just like doing valves. If that didn't do the trick there were annealed aluminum crush washers/gaskets that we would use. You are correct that there were no head gaskets as such from the factory.

Glad you found the ground issues and the TPS being glitchy. Fix that before you do more to it . You may find all is well then.

My VW engine builder is a close friend of mine, he tried and tried to get the old heads to seal using that lapping method. I even machined the floor of the heads to give a "new surface" and no luck. It was best to make them boat anchors instead of trusting them on this engine!
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Chassis and Suspension / Re: DS a-arm kit information needed.
« Last post by dsrace on July 22, 2021, 08:50:58 AM »
thats the only way i can imagine. i am not sure why one would go to that amount of time and effort then use a carb mechanical advance??!! the motorcraft tfi modules had lengthy lives. the ecu has an effect on timing and uses tps and vam ( vane air meter) for ae fueling. so bypassing that , imo, was counter productive by that person.   at the same time i feel the vam is no kill mouse trap  :D  but it does work
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Chassis and Suspension / Re: DS a-arm kit information needed.
« Last post by fabr on July 22, 2021, 07:49:21 AM »
i would like to know how they are getting the stock tfi to function with all the bypassns you described. i wouldn't believe that to work but somehow they have.

auto enrich ( ae) is like the accel pump shot in a carb. its done a few diff ways but in your case ( with a stock ecu) its done via the vam and or tps. that vam is a very early and poor version of a mass air flow sensor, (maf sensor). they do work but there not as a instant response as tps/map based. my megasquirt ecu doesnt use a maf but rather just a map and tps for ae.

as fabr stated above.....replace the tps and verify it operating the correct voltage range. that should help the stumble. beyond that, would have to know what/why whomever bypassed the tfi. if they truly bypassed it then there must be something else controller timing. i wonder if they went with a mechanical advance from the older carb version??
I bet you would be right.
7
Chassis and Suspension / Re: DS a-arm kit information needed.
« Last post by dsrace on July 22, 2021, 07:09:47 AM »
i would like to know how they are getting the stock tfi to function with all the bypassns you described. i wouldn't believe that to work but somehow they have.

auto enrich ( ae) is like the accel pump shot in a carb. its done a few diff ways but in your case ( with a stock ecu) its done via the vam and or tps. that vam is a very early and poor version of a mass air flow sensor, (maf sensor). they do work but there not as a instant response as tps/map based. my megasquirt ecu doesnt use a maf but rather just a map and tps for ae.

as fabr stated above.....replace the tps and verify it operating the correct voltage range. that should help the stumble. beyond that, would have to know what/why whomever bypassed the tfi. if they truly bypassed it then there must be something else controller timing. i wonder if they went with a mechanical advance from the older carb version??
8
Chassis and Suspension / Re: DS a-arm kit information needed.
« Last post by fabr on July 22, 2021, 06:30:39 AM »
Sorry,I had it in my head you were running the Ford engine with VW controls but it's the other way around. I worked at a VW dealership in the engine/trans dept about 45 years ago. If the head to cylinder surfaces were not good we would lap them in just like doing valves. If that didn't do the trick there were annealed aluminum crush washers/gaskets that we would use. You are correct that there were no head gaskets as such from the factory.

Glad you found the ground issues and the TPS being glitchy. Fix that before you do more to it . You may find all is well then. 
9
Chassis and Suspension / Re: DS a-arm kit information needed.
« Last post by Aprilfools on July 21, 2021, 08:12:35 PM »
great you found the bad grounds! that will always bit a guy in the back side.

as far as video's....have to up load them to site like youtube or rumble and post the link.

i am amazed it runs with out the snout connector! wonder what they did to bypass that??

I'm not sure, the wiring in this thing is a head scratcher to say the least.  There are alot of things missing. But most everything I have tested tests ok. I will admit, I can work on about anything but electrical is not my area at all!! So I get stumped quickly chasing this stuff down.
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Chassis and Suspension / Re: DS a-arm kit information needed.
« Last post by Aprilfools on July 21, 2021, 08:07:43 PM »
as fabr said .... check the tps first.
def re connect the snout wire. i am not even sure you'll get auto enrich with the snout disconnected. which in essence would be the pump shot if it were a carb.

After going through the harness tonight the snout has been removed and is gone. There are wires in the pigtail that goes to the distributor that are cut, some are spliced together.  This was all done prior to me acquiring this. It is advancing now but I am curious of what you mention above with the "auto enrich "? It does seem to stumble right when boost would come on, would this effect that? Or could the TPS as well? After the stumble and hesitations (which are lean) it does finally increase fuel pressure, makes boost and pressure does increase while building boost when watching the fuel gauge. So I am curious of this auto enrich?
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