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KTPhil 
Samba Member
Joined: April 06, 2006
Posts: 34018
Location: Conejo Valley, CA
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 Posted: Sun Apr 24, 2016 8:22 pm Post subject: Re: Fuel injection help!!! |
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The grey boots go on the rearward pair of injectors; the black ones go to the front ("front" as in front of the car).
The plastic connector housing may fit into the injector, but the actual female spade connectors may not make good contact. If you are careful, you can separate the wires/connectors from the housing and gently tighten them, then reinstall them. Usually this problem make it cut out, not run rich, though.
Last edited by KTPhil on Mon Apr 25, 2016 12:51 pm; edited 2 times in total |
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72squareguy
Samba Member
Joined: February 09, 2013
Posts: 111
Location: Victorville, CA
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| Posted: Mon Apr 25, 2016 8:01 am Post subject: Re: Fuel injection help!!! |
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| Ah okay! A friend told me that d jetronic had a problem with the connectors and harnesses. I always thought that had resistance issues at the grounds. |
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72squareguy
Samba Member
Joined: February 09, 2013
Posts: 111
Location: Victorville, CA
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| Posted: Mon Apr 25, 2016 8:34 am Post subject: Re: Fuel injection help!!! |
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| Hey Tram, I see on those trouble shoot guides you posted when it says "engine not reaching full output" it says regulator flap for crankcase vacuum stuck. What flap is it talking about? Or is that for the "K" systems? |
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Tram
Samba Socialist
Joined: May 02, 2003
Posts: 22728
Location: Still Feelin' the Bern- Once you've felt it you can't un- feel it.
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| Posted: Mon Apr 25, 2016 11:17 am Post subject: Re: Fuel injection help!!! |
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| 72squareguy wrote: |
| Hey Tram, I see on those trouble shoot guides you posted when it says "engine not reaching full output" it says regulator flap for crankcase vacuum stuck. What flap is it talking about? Or is that for the "K" systems? |
K is for Kraftstoff, which is German for "Fuel". Thus, the fuel systems book is the "K manual".
The regulator flap is the butterfly in the throttle body.
Two of the things they left out there are 1) too much slack in the throttle cable and 2) carpet, ice (in winter where it snows), or other obstructions under the throttle pedal.
We're reasonably sure you have something else going on because you're "breaking up" and have black smoke.
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KTPhil
Samba Member
Joined: April 06, 2006
Posts: 34018
Location: Conejo Valley, CA
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| Posted: Mon Apr 25, 2016 12:52 pm Post subject: Re: Fuel injection help!!! |
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| 72squareguy wrote: |
| Ah okay! A friend told me that d jetronic had a problem with the connectors and harnesses. I always thought that had resistance issues at the grounds. |
Yes, that, too. Those are larger and unjacketed, so they are easier to clean, pinch and re-attach. |
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72squareguy
Samba Member
Joined: February 09, 2013
Posts: 111
Location: Victorville, CA
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| Posted: Mon Apr 25, 2016 2:45 pm Post subject: Re: Fuel injection help!!! |
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| I'm still thinking it's something to do with the MPS. I do have another throttle switch laying around that I can try again. I've been eliminating things one by one. Haven't swapped out the MPS yet though. |
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72squareguy
Samba Member
Joined: February 09, 2013
Posts: 111
Location: Victorville, CA
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| Posted: Mon Apr 25, 2016 2:49 pm Post subject: Re: Fuel injection help!!! |
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| Also, I would like to add that I don't think the AAR is closing when warm. Even when hot, you pull the little hose off the air cleaner you can still feel it sucking. I've taking it apart, cleaned it, an opened an closed it manually. Seem to work fine like that. |
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chaosisme
Samba Member
Joined: August 29, 2005
Posts: 1256
Location: Orange County, Ca
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| Posted: Mon Apr 25, 2016 5:24 pm Post subject: Re: Fuel injection help!!! |
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| 72squareguy wrote: |
| Also, I would like to add that I don't think the AAR is closing when warm. Even when hot, you pull the little hose off the air cleaner you can still feel it sucking. I've taking it apart, cleaned it, an opened an closed it manually. Seem to work fine like that. |
I think that even when the AAR is "closed" it still pulls vacuum when you unhook the hose to it. I think the main thing to look for is that when you unhook it and put your thumb over the hose your idle doesnt change, that would tell you if the AAR isnt fully closing.
I replaced my AAR with an NOS one I found and it still sucks a bit with the hose off, but if I plug the hose it doesnt change my idle so Im pretty certain its adjusted properly.
Maybe somebody else can chime in though.
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72squareguy
Samba Member
Joined: February 09, 2013
Posts: 111
Location: Victorville, CA
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| Posted: Mon Apr 25, 2016 6:27 pm Post subject: Re: Fuel injection help!!! |
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| chaosisme wrote: |
| 72squareguy wrote: |
| Also, I would like to add that I don't think the AAR is closing when warm. Even when hot, you pull the little hose off the air cleaner you can still feel it sucking. I've taking it apart, cleaned it, an opened an closed it manually. Seem to work fine like that. |
I think that even when the AAR is "closed" it still pulls vacuum when you unhook the hose to it. I think the main thing to look for is that when you unhook it and put your thumb over the hose your idle doesnt change, that would tell you if the AAR isnt fully closing.
I replaced my AAR with an NOS one I found and it still sucks a bit with the hose off, but if I plug the hose it doesnt change my idle so Im pretty certain its adjusted properly.
Maybe somebody else can chime in though. |
I see. It's probably closing all the then because it doesn't affect idle. Just on cold starts it does of course. |
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72squareguy
Samba Member
Joined: February 09, 2013
Posts: 111
Location: Victorville, CA
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| Posted: Mon Apr 25, 2016 6:29 pm Post subject: Re: Fuel injection help!!! |
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| At this point I bet it would be nice to have one of those nice diagnostic machines. LOL |
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D/A/N
Samba Member
Joined: August 13, 2010
Posts: 2227
Location: 11222
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| Posted: Mon Apr 25, 2016 6:57 pm Post subject: Re: Fuel injection help!!! |
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| 72squareguy wrote: |
| At this point I bet it would be nice to have one of those nice diagnostic machines. LOL |
I'm in temporary possession of one of the Bosch EFAW testers and it's no big deal. Almost everything it does you can do with a DVOM. It's cool that you can run the tests through the harness and one of them through the ECU itself, but really it's not a salvation machine. |
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72squareguy
Samba Member
Joined: February 09, 2013
Posts: 111
Location: Victorville, CA
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| Posted: Tue Apr 26, 2016 8:49 am Post subject: Re: Fuel injection help!!! |
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| Hey tram would over advanced timing cause this? And I've always had a problem with car with timing jumping around. |
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Tram
Samba Socialist
Joined: May 02, 2003
Posts: 22728
Location: Still Feelin' the Bern- Once you've felt it you can't un- feel it.
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| Posted: Tue Apr 26, 2016 9:45 am Post subject: Re: Fuel injection help!!! |
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| 72squareguy wrote: |
| Hey tram would over advanced timing cause this? And I've always had a problem with car with timing jumping around. |
Yes and jumping timing is usually a bad breaker plate which can cause all kinds of issues too.
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Немає виправдання для війни! Я з Україною.
| Bryan67 wrote: |
| Just my hands. And a little lube. No tools. |
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72squareguy
Samba Member
Joined: February 09, 2013
Posts: 111
Location: Victorville, CA
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| Posted: Tue Apr 26, 2016 7:28 pm Post subject: Re: Fuel injection help!!! |
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Another thing I noticed. In my random box full of extra F.I distributors I have, I noticed that some have your regular 009 style points. And some others have these different ones (which is the set of the right in the picture).
Whats this about??
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72squareguy
Samba Member
Joined: February 09, 2013
Posts: 111
Location: Victorville, CA
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| Posted: Wed Apr 27, 2016 10:36 am Post subject: Re: Fuel injection help!!! |
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| I found another MPS for my car online and bought it. Now just have to wait for it to come in. When I build this motor last, I put on those heat insulators on between the F.I intake manifolds and the heads. Are these supposed to be on there? I figured they are. I found them stashed in a 71 squareback parts car. |
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KTPhil
Samba Member
Joined: April 06, 2006
Posts: 34018
Location: Conejo Valley, CA
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| Posted: Wed Apr 27, 2016 12:12 pm Post subject: Re: Fuel injection help!!! |
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Yes, those insulation blocks/spacers are needed.
Match numbers carefully on your MPS and other FI purchases. And resist the temptation to throw parts at what often turns out to be a non-FI problem, or a simple wiring defect. |
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72squareguy
Samba Member
Joined: February 09, 2013
Posts: 111
Location: Victorville, CA
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| Posted: Wed Apr 27, 2016 12:33 pm Post subject: Re: Fuel injection help!!! |
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| KTPhil wrote: |
Yes, those insulation blocks/spacers are needed.
Match numbers carefully on your MPS and other FI purchases. And resist the temptation to throw parts at what often turns out to be a non-FI problem, or a simple wiring defect. |
I get what your saying about the temptation of throwing parts at it. At this point I'm lost on it. I can't figure out what it is. A friend keeps telling me that it's the connectors that plug into the injectors themselves. When your plugging them in they seem to go on tight but once they bottom out they do wiggle a little. Is there a certain way to take they out of the plastic connector? Maybe to tighten and clean them up. I'm thinking it's a wiring thing. I did put together another distributor for it and it did the exact same thing. |
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Mike Fisher
Samba Member
Joined: January 30, 2006
Posts: 17970
Location: Eugene, OR
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| Posted: Wed Apr 27, 2016 1:09 pm Post subject: Re: Fuel injection help!!! |
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Wiggle & unplug individual injectors, while it is running to see if the engine runs differently.
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D/A/N
Samba Member
Joined: August 13, 2010
Posts: 2227
Location: 11222
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| Posted: Wed Apr 27, 2016 3:15 pm Post subject: Re: Fuel injection help!!! |
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| 72squareguy wrote: |
| Is there a certain way to take they out of the plastic connector? Maybe to tighten and clean them up. |
Yes, you just need a slender enough piece of metal to slide up into the end that that pushes on the injectors. Each metal connector end has a metal tab that locks it in place inside the plastic piece. You need to press that tab down with something and the wire should come out very easily. Then, you can clean up the connectors and tighten them gently with pliers. To reinstall, you need to pry the metal tab back up so the connector will lock back into the plastic. You'll hear a click when that happens. |
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KTPhil
Samba Member
Joined: April 06, 2006
Posts: 34018
Location: Conejo Valley, CA
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| Posted: Wed Apr 27, 2016 3:25 pm Post subject: Re: Fuel injection help!!! |
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| 72squareguy wrote: |
| A friend keeps telling me that it's the connectors that plug into the injectors themselves. When your plugging them in they seem to go on tight but once they bottom out they do wiggle a little. Is there a certain way to take they out of the plastic connector? Maybe to tighten and clean them up. |
Excerpt from a thread about this:
| Quote: |
The problem was the loosened rolled edges. I pulled the actual metal female contacts out using a jewelers screwdriver, and squeezed them slightly tighter. This has to be done carefully because they can split entirely at the roll.
Do you know how to remove contacts from the plastic housing? You have to depress a tab from the face of the connector while pushing the wire slightly IN, then once the tab is pressed flat, pull the wire OUT and it will slide out.
Typical FLAPS contact without locking tab:
Locking type used here:
Here I am removing a male contact from an ignition connector housing, but the idea is the same:
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