Ok last question I hope. Same car, 79 242GT B21F, manual traanny. It has the manual injection system, CIS. I can get the car started fine. First turn of the key everytime. It starts idleing around 1000, then after opening the throttle it goes to 2K plus. It stays there no matter what I do. There is a gap between the throttle stop and lever. I can not make it go all the way closed. I can adjust the air screw and get it to idle down but the smell of gas is strong. I gueess I am enriching the mixture too much. Is there any thing or procedure I need to do to get an idle of 800? I am not familiar with this system and I am lost..I know there is a diaphram that controls the fuel flow to the injectors by metering the air pressure,but will that cause the high idle? HELP!!!!!!!!!!!!!!!!!!!
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Max..1989 244 DL 5 Spd., V15 Phase II Cam Bilstein HD, Turbo Swaybars, Poly Bushings all round, Turbo Wheels, Black leather interior, Electric mirrors, LED dash and gauge lights and now NEW ECODES with the turn signals, 1992 black 244 next project

Max,
I know everybody is going to diss the Haynes manual,
But It covers 1976-1993
Page 4A-14
CIS Fuel Injection System/Troubleshooting

Symptom=Engine Idles Too Fast

A/Probable cause=Accelerator pedal,cable or throttle valve binding.
Corrective action=Inspect for worn or broken parts,kinked cable,
or other damage.Replace faulty injectors.
See section 12

B/Probable cause=Auxiliary air regulator faulty.
Corrective action=Test and if necessary,
replace Auxiliary air regulator
See section 12

C/probable cause=Air leaking past throttle valve
Inspect throttle valve and adjust,or replace as required.
See section 12

Section 12 is pretty involved,but descriptive.
At least these books are available at the auto stores.
Post back if you narrow it down,and I will tell you
what they say in section 12
I hope this helps a little bit,
Ken

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69-145-S ; 71-145-S ; 72-145-E ; 72-1800-ES ; 87-245-DL

Hey man, my Haynes Manual says 1974 to 1980. The newer one say 1974 to 1984

What are you readin'???

CB
Reading,Haynes # 97020
From Kragan 2 years ago.
Ken
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69-145-S ; 71-145-S ; 72-145-E ; 72-1800-ES ; 87-245-DL

Redwood; I just dug out the old Haynes. I am reading it now, Thanks for the reminder..Yep. better description on this unit..Will let you know hat I find..
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Max..1989 244 DL 5 Spd., V15 Phase II Cam Bilstein HD, Turbo Swaybars, Poly Bushings all round, Turbo Wheels, Black leather interior, Electric mirrors, LED dash and gauge lights and now NEW ECODES with the turn signals, 1992 black 244 next project

You know the Aux Air Valves on the D-jet
stuff are ALL dead by now,so we live with
a high initial idle or retrofit a bmw one for
$230 ouch!
I would check that first.
And RPR MIGHT just have one...
'Chair'
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69-145-S ; 71-145-S ; 72-145-E ; 72-1800-ES ; 87-245-DL

Saab 900s had Aux air valves until at least 84. I think the aux air valve acually had a smoother idle, compared to the CIS system. There is no control unit messing with idle all the time. The Haynes Saab 900 manual actually has a much better chapter on Kjet than the Volvo Haynes.

A couple of sites that may help:

http://www.volvoclub.org.uk/tech/fuel_injection/k_jetronic.shtml

and also, Google "k-jet.org" and get the proper URL.

One of these has a good article about setting base idle on the K-jet.

Idle is also controlled by vacuum leaks. If you have a rich mixture plus vac leaks at throttle body, manifold gasket, injector seals, etc., that will allow extra air in and raise idle speed. Spray WD-40 carb cleaner or even plain water at every possible leak point and see what effect it has on idle. If ANY - there's a vac. leak at that point.
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Bob (son's 81-244GL B21F/M46, dtr's 83-244DL B23F/M46, my 94-944 B230FD and 89 745 (LT-1 V8); hobbycar 77 MGB, and a few old motorcycles)

Thanks Bob..I just remembered when I went to check the heat coming out of the vents for the overheating problem I am having. There was no air from them. Only air from floor area. Must be a vacuum leak.. I will address it in the morning..Went out to remove something off the car a few minutes ago and woke the neighbors up..Think I will give it a rest for tonight.. I do not think they appericated my air wrench at 1:30 in the morning..Thanks for the advice.. Max
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Max..1989 244 DL 5 Spd., V15 Phase II Cam Bilstein HD, Turbo Swaybars, Poly Bushings all round, Turbo Wheels, Black leather interior, Electric mirrors, LED dash and gauge lights and now NEW ECODES with the turn signals, 1992 black 244 next project

two things control the idle.

one is the Aux Air Valve, it starts in an open position then assisted by an electrical "heater" closes as the engine warms up. It sits off the valve cover, has a connector and hoses that bypass the throttle plate.

the other is in the fuel distributor itself. in the middle of the "box" where the 4 fuel lines that go to the injectors, is a hole. You need a long allen wrench (8mm) I think, to turn the adjuster. It helps to have a dwell meter hooked up to the test point (a female blade connection) that sits just in front of the drivers shock tower. This allen adjustment changes the blance of the air sensor plate inside the fuel distrubutor.

FWIW if you have no experience with these older models, I suggest that your get The Volvo Problem Solver. a book...$65.

the allen wrench adjustment....is for rich/lean.

I was afraid of that. What is the adjustment on the side of the throttle body? It is a black knob that does effect teh mixture.. Any ideas?? Thanks..Max..P.S. Is readjusting the boot between the fuel dist and the throttle body have anything to do with it? There is an arrow but I do not know what it lines up with??Max..
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Max..1989 244 DL 5 Spd., V15 Phase II Cam Bilstein HD, Turbo Swaybars, Poly Bushings all round, Turbo Wheels, Black leather interior, Electric mirrors, LED dash and gauge lights and now NEW ECODES with the turn signals, 1992 black 244 next project

The aux air valve increases the idle when the engine is cold. At operating temp the aux air valve should be closed so it does not regulate idle. The warm idle on old kjets is the base idle. Some intakes have a large plastic screw to adjust base idle, and others just use the stop screw on the throttle.

To set the base idle make sure the engine is warm and then block off the Aux air valve. I have used vice grips being careful not to damage the hose. Set the base idle with whatever adjustment your intake has. Once that is set unblock the Aux air valve. If the idle goes up when you do this your Aux air valve is not working. If you can't set the base idle this way you have bigger problems.

Kjet running rich could be caused by many things. You should get a Bentley manual. It only covers Turbo kjets, but almost all the information and tests work with the older kjet 240s. The component locations are different, and the Aux air valve is not covered since the turbos had a constant idle system.

Jessie, I have a Bentley. It just seemed not to be real specific about the idle adjustments. As you said, it describes the turbo. I know they are close but then again it does no go back to 1979. ITs an 83 and up book. I have the black knob on the left side of the throttle body and the little set screw at the linkage control to the throttle plate. I get lost on the fuel distributor control about the air flow sensor plate. Can it make the idle go high? If I do not have the connecting boot on the correct way will it effect the idle? Just had a thought sitting here. What if the throttle plate is binding?? Hmm..That could be why the linkage will not go all the way to the stop screw..It's midnight, great I will wake the neighbors...Going to remove the throttle body.. Thanks for all your help..Max:>)
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Max..1989 244 DL 5 Spd., V15 Phase II Cam Bilstein HD, Turbo Swaybars, Poly Bushings all round, Turbo Wheels, Black leather interior, Electric mirrors, LED dash and gauge lights and now NEW ECODES with the turn signals, 1992 black 244 next project