How to adjust CCC Qjet TPS
02-27-2006, 01:11 PM
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Car: 2000 BMW M5
How to adjust CCC Qjet TPS
Hi guys, I just rebuilt a CCC Qjet for my 305. I have not run it yet, but I have a couple quick questions:
1. What should the TPS read at idle ,with the throttle kicker off
2. How do I adjust the TPS if it is significantly out of spec?
Also, I do not have a stock wiring harness. How do I check dwell on the mixture control solenoid, since I do not have the factory disconnect point where you would insert the dwell meter? I do know you use the 6 cyl setting
1. What should the TPS read at idle ,with the throttle kicker off
2. How do I adjust the TPS if it is significantly out of spec?
Also, I do not have a stock wiring harness. How do I check dwell on the mixture control solenoid, since I do not have the factory disconnect point where you would insert the dwell meter? I do know you use the 6 cyl setting
02-28-2006, 07:26 PM
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Once the engine is fully warmed and the curb idle is set (A/C off, follow VECI label instructions) the TPS should be 0.48VDC, ±0.06. You'll need a 2.5mm hex socket with a very thin wall.
03-01-2006, 07:14 AM
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Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
kboehringer posted in an earlier thread a method to backprobe at the MCS for dwell. Try:
https://www.thirdgen.org/techbb2/sho...hreadid=328668
https://www.thirdgen.org/techbb2/sho...hreadid=328668
03-01-2006, 12:52 PM
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I saw that post. He says he "thinks" you probe to pin B on the MCS. Where does the other wire on the dwell meter go, ground? Which pin is "B" on the MCS, I didn't see that they were labeled (unless the labeling is on the plug itself)
03-01-2006, 12:57 PM
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Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
I would assume pin B is the middle pin and the other lead for the meter goes to any available ground. Might want to PM Kboe to make sure. I don't have my manuals with me.
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03-03-2006, 11:09 AM
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Car: 88 Camaro
Engine: 5.3
Transmission: TH350
When you said you dont have a factory wiring harness, what kind of harness do you have? I need a new one because mine is shot to hell! It spliced everywhere, some stuff is missing. I really need a new one!
03-10-2006, 01:58 PM
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Car: 91 Z28 24th Anniversary
Engine: L98
Transmission: Auto
Axle/Gears: Posi 3.23
You should be probing the middle wire on the TPS for TPS voltage. If you're adjusting M/C dwell, use an analog TAC/Dwell meter set to dwell 6 cylinder. It should fluctuate between 35 and 45 degrees.
03-12-2006, 12:16 AM
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Car: 1982 - Z28
Engine: 350 / CCC Q-Jet
Transmission: THM-700R4
Axle/Gears: 10 Bolt - 3.73
Originally posted by 327_TPI_77_Maro
I saw that post. He says he "thinks" you probe to pin B on the MCS. Where does the other wire on the dwell meter go, ground? Which pin is "B" on the MCS, I didn't see that they were labeled (unless the labeling is on the plug itself)
I saw that post. He says he "thinks" you probe to pin B on the MCS. Where does the other wire on the dwell meter go, ground? Which pin is "B" on the MCS, I didn't see that they were labeled (unless the labeling is on the plug itself)
Try a paper clip slid into the rear of the connector, works great.
Other wire goes to ground.
Kurt
03-13-2006, 09:19 PM
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Car: 83 POS monte carlo 2015 chevy P/U
Engine: 92 5.7 tpi 5.3
Transmission: 700r4 6L60E
Axle/Gears: 2.42 too high
when you pull the little plug that covers the TPS adjustment screw, use a left handed drill bit to drill a hole in it.
if you use a standard bit, when the bit binds up in the plug it will run the adjustment screw in too far & you will have one hell of a time getting it back out. with a left handed bit when it binds it will back the screw out & you can just put it back in.
i said when because after years doing a lot of CC carb overhauls i know that odds are it will bind just as the bit breaks through the plug.
if you use a standard bit, when the bit binds up in the plug it will run the adjustment screw in too far & you will have one hell of a time getting it back out. with a left handed bit when it binds it will back the screw out & you can just put it back in.
i said when because after years doing a lot of CC carb overhauls i know that odds are it will bind just as the bit breaks through the plug.
03-14-2006, 02:09 PM
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Car: 2000 BMW M5
There really aren't that many wires on these cars, this is pretty simple wiring. I am used to TPIs that have a lot more wires, so this stuff was a welcome change.
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