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914World.com _ 914World Garage _ Losing Power When Taking Off

Posted by: JohnWayne Aug 24 2012, 02:00 PM

The car is a 1973 1.7l d-jet. The car drives really nice besides the fact it randomly loses power while taking off. Would this be a fuel pressure problem or something else?

Thanks,

Posted by: brant Aug 24 2012, 02:28 PM

kinda sounds like a timing issue

did you follow the haynes manual when you checked timing?
did you have the vacuum line disconnected when you set the timing?

Posted by: JohnWayne Aug 24 2012, 02:36 PM

which vacuum line is supposed to be disconnected when setting the timing?

Posted by: brant Aug 24 2012, 02:53 PM

I don't have a manual in front of me.
it should be on the site through search

its one of the vacuum lines on the distributor, advance I think

without disconnecting it, your timing setting is false.

did you set the timing at full advance? (3200 rpm-ish)

Posted by: JohnWayne Aug 24 2012, 02:59 PM

I never set it while at 3200rpm, so i'll try setting the timing again.

Thanks

Posted by: SLITS Aug 24 2012, 03:16 PM

Both distributor lines disconnected ... 27 degrees @ 3000 - 3500 RPM.

I use 3000 RPM.

Posted by: brant Aug 24 2012, 03:19 PM

the weights inside of the distributor change the advance. but at 3200 rpm they are fully extended and its at max advance.

setting the timing at idle means that when the weights kick up your advance you are change the timing a lot

the vacuum pot on the distributor also advances and retards the timing depending on which side of the diaphram is being pulled/pushed by the vacuum (thus the need to disconnect the one line)

you can't get your timing right without those 2 steps.
I bet it runs a lot better when you get it re-timed.

brant

Posted by: brant Aug 24 2012, 03:22 PM

like always, do what Ron says.

and you might be able to throw in one or two degrees additional advance at this altitude.

(but you can't drive the car down to sea level without changing it back to the factory 27degree's)

does this happen to be the red car that just sold in colorado springs. Mikes car I believe....

Posted by: JohnWayne Aug 24 2012, 03:55 PM

Thanks for the answers guys. I'll set the timing tonight.

Oh and this is a different 914 than the one that just sold.

Attached thumbnail(s)

Posted by: brant Aug 24 2012, 03:59 PM

pretty car!