Q-Jet accelerator pump replacement - Team Camaro Tech
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post #1 of 5 (permalink) Old Oct 8th, 01, 10:35 PM Thread Starter
 
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Hi all, I got a van with a Q-Jet that seems to be lacking any initial "squirt" of fuel when the pedal is depressed. Needless to say it nearly stalls off the line, and it is tough to start after sitting a while. My question is "how big of a job is it to replace the accelerator pump on a q-jet?", as I am almost certain this is what is wrong. Any advice is appreciated, and thanks in advance.

BW

[This message has been edited by BreathWeapon (edited 10-09-2001).]
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post #2 of 5 (permalink) Old Oct 9th, 01, 01:16 AM
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There is an adjustment for the pump, two holes on the pump arm, you might try a different hole. The further away the rod from the pivot point of the arm, the more fuel. Check to make sure the pump shoots fuel the same time throttle is opened, should be no clearance between the pump arm and the pump top. If you still want to change pump, see below.

The following steps will change the pump:
1. Go to parts store and purchase either a kit or the pump itself, presonally, I'd buy the kit, Step 6 may result in a torn gasket.
2. Remove engine cover, air filter asembly.
3. Remove secondary needles and hangar.
4. Disconnect pump linkage by removing clip, remove choke pull-off vacuum hose from base, and disconnect choke rod if divorced choke.
5. Remove front two bolts holding carb to intake manifold, remove eight screws holding air horn onto carb body. Keep track of length to hole.
6. Carefully pull straight up with air horn, gasket may tear at this point, depending upon age.
7. Remove pump, replace with new pump. Make sure edge of new pump does not curl up upon insertion into well.
8. Reassemble in reverse order. Make sure primary needles seat into their respective jets. Pump rod may require adjustment.

Good luck, be sure to have a cold drink when finished.

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Everett 68/350/PG/11.90/115mph
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post #3 of 5 (permalink) Old Oct 9th, 01, 10:56 AM Thread Starter
 
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Hey great, thanks man. Looks like the hardest thing will be simply maneuvering around in the cramped space (vans are horrible to do engine work on, heh). The pump is no longer squirting any fuel, so it looks like time to replace it. I best do this asap before winter sets in and the van won't start at all.

Thanks again for the help!
BW
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post #4 of 5 (permalink) Old Oct 10th, 01, 01:01 AM
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I forgot, if a van, maybe you should remove carb from engine, crapped space is correct. You make the call.

Winter does come sooner in Canada, garage?

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post #5 of 5 (permalink) Old Oct 10th, 01, 01:49 AM Thread Starter
 
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Aye, I do have a garage, but it is attatched to the basement of the house, and the van doesn't fit in there, heh. It would probably be best to rip the carb off and then bring IT to the workbench. Still not a job I look forward too with limited time and daylight hours, but a man must do what he must I suppose. Wish me luck!

BW
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