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engine bogs in 4th gear..
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j5josher
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PostPosted: Mon Aug 03, 2009 6:09 pm    Post subject: engine bogs in 4th gear.. Reply with quote

I was driving my 74 thing today and on the highway and it just started to slow down...

i stoped and played with the fuel filter sparyed some seafoam in the carb just for extra joy.. and it ran great for 10ish miles. then it boged again..

stoped and got a tow home..

got home and played with the igntion... changed spark plugs... checked timing...

went driving.. 1st ran like a beast... 2nd voom voom voom... 3rd.. getting there now... 4th boggggggedd dead...

well limped back home..

checked compression cylinder 1 was 60 psi cylinder 2 was 90 cylinder 4 120...

so what could the problem be?

rings? valves? i thought it could be the tappers but that would make it high... i never seen them tighten them selfs up... i seen them fly off...

well thank yall for reading this...

please help
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Randy in Maine
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PostPosted: Mon Aug 03, 2009 6:13 pm    Post subject: Reply with quote

Did you adjust the valves prior to doing a compression test?

Here is the best rap I have seen in doing a compression test (blow off the FI stuff for your though)

http://www.ratwell.com/technical/FAQ/FAQContent.html#0101

http://www.ratwell.com/technical/FAQ/FAQContent.html#0105
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j5josher
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PostPosted: Tue Aug 04, 2009 12:20 pm    Post subject: Reply with quote

wasn't my tappers adjusted all of them and they were all in a good range for my liking...

still doesn't drive...

i can floor it in 1st and 2nd but now 3rd and 4th are just dead gears...
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Das Dragon
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PostPosted: Tue Aug 04, 2009 12:40 pm    Post subject: Reply with quote

Your fuel pump might be wearing out, if not starting at the fuel tank, check the 'sock' in the tank, any filters in the fuel line. Sounds to me you're running out of fuel.
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j5josher
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PostPosted: Wed Aug 05, 2009 10:25 am    Post subject: Reply with quote

filter before carb is getting alot of fuel.. what would be the cause of 60psi on number 1?
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Towel Rail
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PostPosted: Wed Aug 05, 2009 5:53 pm    Post subject: Reply with quote

Worn rings, distorted cylinder, valve(s)...

How did all of the plugs look? Is there evidence that cyl #1 was misfiring, possibly wearing early due to fuel wash? Or perhaps there was an intake leak to that cylinder and it actually ran too hot for a spell...

- Scott
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snookerdude
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PostPosted: Wed Aug 05, 2009 8:18 pm    Post subject: Reply with quote

loose head on passenger side?
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j5josher
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PostPosted: Thu Aug 06, 2009 5:49 am    Post subject: Reply with quote

i'll look for all of these..

it is way past time for a rebuild...

thanks

im about to buy a new car so the thing will have to wait for another paycheck...

im tired of having my car break down every now and again...

but i still love vw's.. i need a better dd you know..
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JoelH
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PostPosted: Thu Aug 06, 2009 5:13 pm    Post subject: Reply with quote

I've always been told that it doesn't really matter what your compression is. you could have all cylinders at 75 psi and be fine, it's when you have 1 @ 60 and 2 @ 90 and 1 @ 120 that you have a problem. they should all be relatively the same. I would say it's time to throw some P & C's on it and get your heads gone through at the same time. At the least check your valve seats and maybe do a quick lap dance on them Smile

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j5josher
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PostPosted: Mon Dec 07, 2009 4:24 pm    Post subject: Reply with quote

yea bearings worn out and the head had a crack in it...

waiting on new clutch/ dissy and alot of nice stuff to rebuild it...
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nsracing
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PostPosted: Wed Dec 09, 2009 9:11 pm    Post subject: Reply with quote

For crying out loud. We are going to end up tearing into this motor we keep this up.

You got a dirty fuel line, filter or both.

This is an intermittent fuel delivery problem. By the time you get to 4th gear....you are out of fuel.

I will be that when you do get to 4th and bogged down or motor stops running that the fuel bowl is empty.

YOure compression is not the greatest but you have compression. And low compression does not give you intermittent problems. It will problem all the time.

Maybe it is time to clean out your tank or lines. You know there is a brass filter in the tank.
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