Idle Adjustment - Low Idle

[DieselDog]

I had to use the A/C today for the first time this summer. When I switched it on the drag of the compressor caused my massive CTD to stall out!!! It would idle ok(very low) but when I took my foot off the throttle going up the driveway it would stall. I guess I need to step it up a little. Do I just adjust the cable ?? I know this is kind of a dumb question but what the heck... you guys are the best so I thought I'd ask.


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'96 12valve 4x4, White EXT Cab SLT Long Bed. Kenwood CD player w/100 watt custom made subwoofer built under back seat. Silencer ring gone, 3. 55, DTT TC & VB (WOW !!) TST #8 (230/605). Moster tip from GENO'S, ISSPRO Guages on the "A" pillar. "TNT" sprayed in bedliner-also sprayed along lower rocker panel and in the front door threshold. Off to a good start and more to come!!
12 Valves Rule!

 

[DieselB59]

Okay, look at the back of the pump, where the throttle linkage attaches to it. There is a 10mm bolt with a 10mm locknut on it. It should be propped up against the throttle arm. That is the low idle. You want to have someone inside the cab floor the throttle to pull the linkage off it and from under the pump, loosen the nut (clockwise when working above looking down), then carefully give bolt on the top side 1/4 turn counter clockwise and then let the throttle off and start the truck. Once you have it right, lock down the nut by turning it clockwise (counter clockwise when viewed from above). It is a finicky adjustment.

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Chris Timochko
*Association of Diesel Specialists Certified*
AUTO WURKS DIESEL R&D TEAM
1997 5sp 4X4, Rhino Linings, Espar Heater, A. W. D. HX40 turbo, ATS 3pc Manifold, BD 4" Brake, Marine Compression, A. W. D. Custom Tuned Injection Pump, A. W. D. Intercooler, A. W. D. /Mallory Fuel System and Braided Stainless Lines, A. W. D. 370B Injection Nozzles, Delivery Valves, Governor & AFC Spring Kit, Psychotty Air, NOS Diesel Kit, A. W. D. 6" Chrome Exhaust System, BD No Smoke Valet Switch, McLeod Dual Disc Clutch, Mag-Hytec Rear Cover, Cummins Chrome Kit, Optima Red Tops, Hadley Bully Horns, Hurst Line Loc, Goodyear Wrangler AT/S 305/70/16s. 15. 50@97mph on Goodyear All-Terrain tires. Dynoed at Ida's: 435 hp at the rear wheels.
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Project U96 - 1996 3500 2WD racer. A. W. D. Marine Ultra Low Compression, A. W. D. Teflon-coated Pistons, A. W. D. High Lift Camshaft, Ported and Honed Cylinder Head, Intake and Exhaust manifold; A. W. D. HX40 Turbocharger, ATS 3pc Exhaust Manifold, A. W. D. Water Mist Injection, A. W. D. Custom Fabricated Fuel System, Race Spec A. W. D. /BD P7100 Injection Pump, A. W. D. Custom High Flow Fuel Injection Nozzles, BD Auto transmission and Custom TC, Weld Draglites, Goodyear Eagle Drag Slicks, 5" Single Stack Through The Bed, Mag-Hytec on Rear and Transmission. 11. 54@115mph

 

[Joe G.]

Like Chris said. Except that I never have anyone around to help so I just jam a big screwdriver in the linkage near the TPS to hold it open while I do the adjustment.

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Joe George
Eureka, CA

'95 2500 CC auto 4X4,3. 54,Combo EGT/boost guage,custom switch panel,PacBrake,TST #5,DTT TC/VB,Automatic motorhome steps on both sides,Foldacover hard bed cover,Cummins chrome kit,Black steel grill guard,Front hitch receiver

 

[BC]

DieselDog,

I upped my idle rmp about two weeks ago. I had put it off for maybe 3 months. It took me about 20 minutes once I decided to get it done.

About a month ago someone had posted some excellent instructions with pictures on how to up the idle. They were excellent. Do a look up.

Like Joe G. I didn't have anyone helping me, so I jammed a screw drive like he said.

One other thing. I used a mirror so I could see the nut. It is just one of those swivel mirrows that you can buy at any auto parts store.

Like I said, do a look up from a month ago.

Bill Cook