Got a problem with performance

05-28-2001, 11:06 PM

Hi all! Ive got a 74 engine that needs attention and I thought that you guys might be able to help. Here's the situation: CIS system has not been adjusted properly and I dont have a baseline to go on. The car idles somewhat rough at about 950 rpm, and it accelerates nicely and smoothly under normal driving. When I do gun it, it wont make power above 4000 rpm, kinda feels like its on a rev limiter. I misplaced my manual so I need some info. What is the proper timing settings for it? On the CIS adjustment, (on top of the fuel distributor and is adjusted by an allen tool) which direction are lean and rich? Does it sound like this car is running rich or lean based upon the 4000 rpm limit? Are there any baseline adjustments on the air/fuel and idle mixture adjustments? Any info would help and is greatly appreciated.
Thanks in advance.

05-29-2001, 01:59 AM

Sounds well known...

If you car is idling & driving fine up to 4000 rpm, everything with the CIS system looks fine.
Maybe the distributor, but I doubt it.

I suspect the fuel pump! I had a worn fuel pump and a bended fuel line when I got the car. Took me half a year to figure it out. Enough fuel for normal driving, but not good enough for full boost. Car kept stalling at 4200 RPM (like a hit in your a__)!.
So check your fuel system first before fiddling around with the CIS!

Jens

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05-29-2001, 06:35 AM

Same with carbs, I had a kink in the line and it was fine at normal driving but the minute I put my foot into it it would bog down pretty bad.

Tom
71T 2.4

05-29-2001, 08:54 AM

Check to see if the distributor mechanical advance is working.

Take off the cap, see if you can turn the rotor by hand, it should pop back into position.

Good luck.

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Nick Hromyak
'85 Carrera 7 & 9 Fuchs
Havin' Fun in Sacramento

05-29-2001, 11:28 AM

Do not make any adjustments until you have made sure the mechanical advance in the distribuitor is working correctly and the fuel filter is fresh(read that as change the fuel filter). I too, think it sounds like you are starving on fuel.
1.change fuel filter
2.check fuel pump pressure.
3.check fuel pump flow.
4.check distribuitor.
Bob W.