Dear Sir,
I have Volvo 1997 S70 T5. My car is experiencing serious idling problems. This problem occurs from time to time. Firstly it seems that the engine is losing a power when my foot is on the acceleration pad, and whenever I release my foot off the pad, the engine is doing instant cut offs. Also when the car is not moving, the revolutions go up and down and it looks that the car will switch itself down. I have checked this with Volvo dealer but they couldn’t find any possible faulty codes in the computer.
In addition every time when I press my brake pad and want to stop a car at the speed of 5-10kmh the idling problem occurs. At that time revolutions are around 900 but then for 2 sec they go down to 500 and back to 700, and again down to 500 till it finally go back to 900.
Could this relate to electrical or mechanical problem?

 

Have the throttle body and idle motor cleaned.It might also be a good idea to have the injectors flushed at the same time.

 

Tech,

What should having the throttle body and idle motor cleaned as well as having the injectors flushed cost? I got a quote of around $180 from my local repair shop.

Air Defender

 

That is a pretty good price. We would get $140.00 just for the fuel injection service.
Most places now include the throttle body as part of the injections service.
Since labor rates go up some that sounds pretty good!!!

 

My 1999 S70 AWD (turbo) is doing the same thing. My brother diagnosed it as the throttle body and or idle bypass (I guess idle motor would be what it is) need cleaning. I have a fairly decent shadetree abilities. My brother is what I would consider close to a factory tech with his BMWs. He suggested that we get together some weekend (we live 2+ hrs apart) to try to clean the TB and the Idle motor. Now my questions:

Is this something that he and I could do with not much trouble?
Are there anythings that we need to be aware of prior to undertaking (OK bad choice of words) this?
Do we need any gaskets or other consumable parts that we should get before hand? He lives in Columbus, IN and there is no local Volvo dealer - nearest would be 1 hour away in Indianapolis.
Any other hints, tips etc.? My brother has a full compliment of english and metric tools so I am not worried about that end of it. How much of the car will we have to disassemble? It looks like the TB is under the intake manifold and that it would be required to take off the intake. Is that so?

Thanks for your help.

Oh, the car has about 100k on the clock.

Ed

 

You will need to buy a new Gasket before doing the job.
First remove the turbo pipe from the top hose to the intercooler to the throttle body.You will need a 7mm socket and very short extension to get the clamp loose under the throttle body.The clamp for the hose is usually set so the nut part of the clamp is towards the front of the car.
You will need to unplug the 2 sensors to slide the pipe out.
Next follow the wire from the throttle body towards the engine and see if the wiring still goes behind the starter bracket.If it does you will need to remove the 2 10mm nuts on the back of the starter and then the 1 12mm bolt holding the bracket to the block.

Then remove the 4 10mm nuts holding the throttle body to the intake.Then you can slide it out and clean it.

Getting the hose back on the throttle body is usually the worse part of the job.

Also some people sometimes remove the cooling fan for more room But I never do.

Good luck and let me know how it goes.

 

where do i get a new volvo throttle body gasket?

 

Try FCpgroton.com
If not search the net. If all else fails Dealer.

 

You can buy Volvo gasket material in the little bottle for 15 dollars at the dealer. Its a pink liquid that makes gaskets. That's what I used on my throttle body and I feel it seals much better