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vott does ziss do?
Join Date: May 2003
Location: Seattle
Posts: 6,676
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acceleration problems
have a 79 here that will idle great but not accept any throttle. any of you ever had this problem and what did you do to fix it? car has rebuilt fuel distributor, injectors, distributor is fine, good fuel pump, etc. etc. thanks
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06-14-2007, 08:01 AM
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Registered
Join Date: Jan 2007
Location: Atlanta
Posts: 305
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I haven't experienced the same thing but have a 79 and noticed it has 2 fuel pumps, internal and external. I wonder what would happen if the silly little internal one was bad, maybe the volume would be drastically reduced possibly? Just a guess, a fuel volume delivery test might be in order.
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06-15-2007, 03:49 AM
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vott does ziss do?
Join Date: May 2003
Location: Seattle
Posts: 6,676
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yep, and that's where it gets tricky. the car has had the fuel tank replaced at one time. whoever did the work put in a single-pump tank.
 there is still enough fuel pressure at the front, but I wonder...
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06-15-2007, 09:25 AM
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vott does ziss do?
Join Date: May 2003
Location: Seattle
Posts: 6,676
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yep, and that's where it gets tricky. the car has had the fuel tank replaced at one time. whoever did the work put in a single-pump tank.
there is still enough fuel pressure at the front, but I wonder...
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06-15-2007, 09:36 AM
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Network Native
Join Date: Jan 2007
Location: SoCal
Posts: 10,349
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Jim Bailey says CIS troubleshooting starts with fuel pressures, check them, then find out what is making them wrong.
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US 83 zinc metallic 5 spd, aka the nice car. Euro 85 black, 5 spd, the fast rough track car maybe car. SOLD Euro 84 red, AT, only car in garage in years, my parts car, soon to go last 7 years. |
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06-16-2007, 02:06 PM
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Join Date: May 2007
Location: Portsmouth, Ohio
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I don't want to be too simple but have you checked the fuel filter. I am not very knowledgeable about cis but its a start!
Checked the idea of a clogged cat converter? If your car has one. Its some of my ideas for you. Brian
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1984 928 Auto 2001 525I 1996 Suburban 2500 454ci |
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06-16-2007, 04:57 PM
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vott does ziss do?
Join Date: May 2003
Location: Seattle
Posts: 6,676
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thanks for all the ideas. don't worry about being too simple. I had all those issues straight before asking you guys, but it doesn't hurt to double check to ensure proper diagnosis
 we've made some progress. after further digging, a large part of it turned out to be a faulty distributor. now there is still an small issue with the fuel distributor. we'll see how that goes...
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06-18-2007, 11:34 AM
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