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Fuel injection relief here!
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Tram
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PostPosted: Mon Jul 28, 2014 11:10 am    Post subject: Reply with quote

ddare wrote:
topless68 wrote:
Oh Guru give me guidance , Surprised I feel the lack of power when climbing hills and I want to add some pep in my step without changing the fuel injection


What's the clearance on your valves? Point and spark plug gap? Timing? Voltage when running? Those need to check out before moving on to diagnose the FI system.


Add fuel pressure to this list and let us know what you find.
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topless68
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PostPosted: Tue Jul 29, 2014 5:37 am    Post subject: Reply with quote

I have electronic points and everything else is stock settings
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tomf51
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PostPosted: Fri Aug 15, 2014 12:59 pm    Post subject: Soaking wire harness Reply with quote

I read in this topic Tram's comments about soaking a hard, aged harness to make more flexible, but I cannot find it. How can I search a topic for specific post content?

Thanks
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rosevillain
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PostPosted: Fri Aug 15, 2014 4:38 pm    Post subject: Reply with quote

I don't know how to search that either. I think it was in D/A/N and neena(?)'s thread - 69 square...the continuing misadventures or something. Lacquer thinner.
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Tram
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PostPosted: Fri Aug 15, 2014 4:49 pm    Post subject: Reply with quote

Soak it in lacquer thinner for 5 minutes or so, longer if needed, but don't just walk away and leave it. Wipe it all off really well after.
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PostPosted: Fri Aug 15, 2014 4:54 pm    Post subject: Reply with quote

Thanks for the reminder. I didn't remember the 5 minute part!!!
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koufax
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PostPosted: Fri Aug 15, 2014 6:57 pm    Post subject: My Squareback troubles Reply with quote

Hi guys, I have a 1970 Squareback, FI, and the car runs intermittently well. I'll be driving fine down the road through all the gears, or even at speed on the freeway, when my engine will act as if it's run out of gas for the briefest second, then back to normal. Sometimes it's one jerky shot, and others, it's a sort of stacatto of 4-5, I don't know what to call them, misses? Fuel pump? Crap in the line? Regulator? I've adjusted timing, new cap, rotor, points, condenser, valve adjustment. I did look into my tank, and saw some loose scale down by the screen and the outlet to the filter and pump. Is this crud causing my car to briefly do what it's doing?
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PostPosted: Sat Aug 16, 2014 6:30 am    Post subject: Re: My Squareback troubles Reply with quote

koufax wrote:
Hi guys, I have a 1970 Squareback, FI, and the car runs intermittently well. I'll be driving fine down the road through all the gears, or even at speed on the freeway, when my engine will act as if it's run out of gas for the briefest second, then back to normal. Sometimes it's one jerky shot, and others, it's a sort of stacatto of 4-5, I don't know what to call them, misses? Fuel pump? Crap in the line? Regulator? I've adjusted timing, new cap, rotor, points, condenser, valve adjustment. I did look into my tank, and saw some loose scale down by the screen and the outlet to the filter and pump. Is this crud causing my car to briefly do what it's doing?


Yup, that sounds like the culprit to me. This can even happen on a carbed car.
The flakes and scale you're seeing are plugging the screen. When it "bucks", it jostles the crap, and lets it go back to normal (moves away from the screen), then it repeats it again, and the cycle continues until you stop somewhere. Then it'll start over on your next trip.
Pull the tank, and clean it out, is really the only solution to that problem. Wink
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PostPosted: Sun Aug 17, 2014 8:39 am    Post subject: Squarback Troubles Reply with quote

Thanks Bob. You helped me affirm that with air-cooled Volkswagens, more often than not, to keep looking for the simplest solutions. Once I get the fuel out, I'm sealing that tank!

Very Happy
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Tram
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PostPosted: Sun Aug 17, 2014 12:37 pm    Post subject: Re: Squarback Troubles Reply with quote

koufax wrote:
Thanks Bob. You helped me affirm that with air-cooled Volkswagens, more often than not, to keep looking for the simplest solutions. Once I get the fuel out, I'm sealing that tank!

Very Happy


NO. You'll plug the baffles! Shocked
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PostPosted: Sun Aug 17, 2014 1:54 pm    Post subject: Re: Squarback Troubles Reply with quote

Tram wrote:
koufax wrote:
Thanks Bob. You helped me affirm that with air-cooled Volkswagens, more often than not, to keep looking for the simplest solutions. Once I get the fuel out, I'm sealing that tank!

Very Happy


NO. You'll plug the baffles! Shocked


The GURU is correct on that. Wink Russ had a drawing showing the baffles inside the fuel, along with how the return fitting works.

If you have a radiator shop nearby, see if they can "boil" it out. Then using the directions in Bentley (fuel section, page 6, 3.3 treating corroded fuel tank), treat the tank so it doesn't happen again.
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71 Notch ...aka Krunchy; build pics here;
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 wrote:
"Friends are God's way of apologizing for relatives."
Tram wrote:
People keep confusing "restored" and "restroyed".
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koufax
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PostPosted: Sun Aug 17, 2014 2:56 pm    Post subject: Reply with quote

Copy that. Got the tank de-scaled with aquarium pebbles, blew it out with compressed air very well, rinsed with gasoline, and now into the Bentley for repairing corroded tanks. No sealing. Got it.

Thanks guys!
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PostPosted: Sun Aug 17, 2014 10:07 pm    Post subject: Reply with quote

'68 square, manual trans, stock everything except Pertronix
Timing 0°, valves .006", fuel pressure 30psi, dwell @ 54° haven't checked voltage cause I'm a dummy.

Engine idles ok. Misses bad under load. Ignition checks out, as far as I can tell. Pulled all of the injectors, found intermittent firing on #4, when running, not cranking. Only #4, not #2. Can't find a broken wire. Replaced the ECU. Cleaned the MAP.

Wire, right?
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Tram
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PostPosted: Sun Aug 17, 2014 11:28 pm    Post subject: Re: Squarback Troubles Reply with quote

Bobnotch wrote:
Tram wrote:
koufax wrote:
Thanks Bob. You helped me affirm that with air-cooled Volkswagens, more often than not, to keep looking for the simplest solutions. Once I get the fuel out, I'm sealing that tank!

Very Happy


NO. You'll plug the baffles! Shocked


The GURU is correct on that. Wink Russ had a drawing showing the baffles inside the fuel, along with how the return fitting works.

If you have a radiator shop nearby, see if they can "boil" it out. Then using the directions in Bentley (fuel section, page 6, 3.3 treating corroded fuel tank), treat the tank so it doesn't happen again.


I. Am. Not. A. Gots. Dam. GURU. Evil or Very Mad
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Tram
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PostPosted: Sun Aug 17, 2014 11:29 pm    Post subject: Reply with quote

rosevillain wrote:
'68 square, manual trans, stock everything except Pertronix
Timing 0°, valves .006", fuel pressure 30psi, dwell @ 54° haven't checked voltage cause I'm a dummy.

Engine idles ok. Misses bad under load. Ignition checks out, as far as I can tell. Pulled all of the injectors, found intermittent firing on #4, when running, not cranking. Only #4, not #2. Can't find a broken wire. Replaced the ECU. Cleaned the MAP.

Wire, right?


I'd suspect injector first... Swap two of them and see if the problem moves.
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rosevillain
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PostPosted: Mon Aug 18, 2014 4:43 am    Post subject: Reply with quote

Tram wrote:
rosevillain wrote:
'68 square, manual trans, stock everything except Pertronix
Timing 0°, valves .006", fuel pressure 30psi, dwell @ 54° haven't checked voltage cause I'm a dummy.

Engine idles ok. Misses bad under load. Ignition checks out, as far as I can tell. Pulled all of the injectors, found intermittent firing on #4, when running, not cranking. Only #4, not #2. Can't find a broken wire. Replaced the ECU. Cleaned the MAP.

Wire, right?


I'd suspect injector first... Swap two of them and see if the problem moves.


It moved.
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Tram
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PostPosted: Mon Aug 18, 2014 9:20 am    Post subject: Reply with quote

rosevillain wrote:
Tram wrote:
rosevillain wrote:
'68 square, manual trans, stock everything except Pertronix
Timing 0°, valves .006", fuel pressure 30psi, dwell @ 54° haven't checked voltage cause I'm a dummy.

Engine idles ok. Misses bad under load. Ignition checks out, as far as I can tell. Pulled all of the injectors, found intermittent firing on #4, when running, not cranking. Only #4, not #2. Can't find a broken wire. Replaced the ECU. Cleaned the MAP.

Wire, right?


I'd suspect injector first... Swap two of them and see if the problem moves.


It moved.


There you go! Injector time.
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rosevillain
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PostPosted: Tue Aug 19, 2014 8:14 pm    Post subject: Reply with quote

Tram wrote:
rosevillain wrote:
Tram wrote:
rosevillain wrote:
'68 square, manual trans, stock everything except Pertronix
Timing 0°, valves .006", fuel pressure 30psi, dwell @ 54° haven't checked voltage cause I'm a dummy.

Engine idles ok. Misses bad under load. Ignition checks out, as far as I can tell. Pulled all of the injectors, found intermittent firing on #4, when running, not cranking. Only #4, not #2. Can't find a broken wire. Replaced the ECU. Cleaned the MAP.

Wire, right?


I'd suspect injector first... Swap two of them and see if the problem moves.


It moved.


There you go! Injector time.


Sorry, man. I meant that the miss moved with the wire. In the mean time, I noticed that the exhaust is blowing black smoke all of the time when running, even if I unplug the offending injector. I'm going to ignore this until I find whatever it is that's causing the miss. Maybe after I put the transaxle and engine back in due to the hockey stick deciding to not play nice.

Not fuel injection related, but any ideas why I have had to move my transaxle once a year to re-set the hockey stick? The shift rod bushing was toast. Maybe that?
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PostPosted: Thu Aug 21, 2014 11:11 am    Post subject: Reply with quote

Quote:

Sorry, man. I meant that the miss moved with the wire. In the mean time, I noticed that the exhaust is blowing black smoke all of the time when running, even if I unplug the offending injector. I'm going to ignore this until I find whatever it is that's causing the miss.


If your exhaust is blowing black smoke when running, that means you are running severely rich. I don't think you can afford to ignore this as running severely rich could in itself be the cause of your miss because of either the poor mixture itself or spark plug fouling due to the poor mixture.

What do the plugs look like? If they're all equally black with carbon then you have some sort of systemic mixture issue causing the rich running which needs to be addressed.
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PostPosted: Thu Aug 21, 2014 12:26 pm    Post subject: Reply with quote

rosevillain wrote:
Maybe after I put the transaxle and engine back in due to the hockey stick deciding to not play nice.

Not fuel injection related, but any ideas why I have had to move my transaxle once a year to re-set the hockey stick? The shift rod bushing was toast. Maybe that?


But I suppose if the bushing so worn you aren't getting full motion, the lack of positive engagement might wear something out. Also check your coupler under the car to see if that's adding to the play or misalignment.
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