Hello,

I have the manifold off of my '83 240 DL and want to clean the throttle body-anyone have pics of cleaning steps.

I assume that it needs to come off the manifold to access the other side?

TIA

Todd

Just to get picky here - it's a Throttle SWITCH, not a Throttle Position Sensor, though the names seem to get interchanged even by the Volvo parts counter gents. A TPS has a potentiometer that tells the computer where the throttle is throughout its full range of motion, and in more sophisticated systems, tells it how fast the position is changing, for such things as fuel enrichment, auto trans kickdown, light cruise fuel leanout, etc.

The TS on your 83 tells the computer whether the throttle is totally closed or not, so the computer can then operate the Idle Air Control system to keep idle speed constant, but stop trying to do that as soon as the throttle opens a hair.

I seem to recall that the TS also sends a signal to the computer at wide open throttle, for fuel enrichment, or whatever...not sure about that one.

Anyhow you have a switch, not a sensor. Did the LH 3.1 systems on one or two years of the latest 240's use a true sensor? Don't know. Well, end of rant.
--
Bob (son's 81-244GL B21F-M46, dtr's 94-940 B230FD, my 83-244DL B23F-M46, 89-745(LT1 V8), 98-S90, 77MGB and four old motorcycles)

A few other notes:
CRC makes a throttle body spray cleaner available at Advance Auto.

I used a 13mm closed end (Craftsman) to get that tough nut near the sensor. I had to take short turns. But it will fit with a little wiggle as the wrench is repositioned.

The throttle linkage has a small latch at the top of the plastic attachment. Loosen it to remove and install the linkage. (At least my '92 has one).

Clean the edges of the flapper, both sides.

In addition to other notes posted, these may help, too.

Mike
--
'83 245 GLT, '92 245DL, '90 760 GLT

A couple of NOTES:
Grab a Toothbrush to get in there easier.

The one nut by the Throttle positioning sensor is a bit tough, I ground down the sides of a 13mm Open ended wrench to help get in there.

To disconnect the connector to the Throttle positioning sensor, Squeeze the Metal retainer... When I first saw these connector 'locks' I assumed you pulled or lifted it.

Spray through the Brass nipples Or up through theses holes to make sure those very small holes in the top of the throttle body are clear.
--
'75 Jeep CJ5 345Hp ChevyPwrd, two motorcycles, '85 Pickup: The '89 Volvo is the newest vehicle I own. it wasn't Volvos safety , it was Longevity that sold me http://home.no.net/ebrox/Tony's%20cars.htm

You need to clean the TB from the backside or it's only half the job. Get a new gasket or you risk vacuum leaks. Remove the TB, being careful of the throttle linkage connectors...pry them off gradually. I remove the Throttle Switch at this point, as I've seen posts here stating that the old carb/choke cleaners can damage it - and they are what I use. If there is a product specifically for cleaning TB's that says it is safe for the TS, try it. Make sure to spray the cleaner into the little air passages in the TB. Compressed air to blow them out is nice to have.

When connecting up the vacuum hoses, check that they are not hardened and stiff, and still fit the stubs snugly. Otherwise - new hoses.

If you removed the TS, make sure it 'clicks' just as the throttle plate/butterfly starts to open. Very easy to check and adjust this with the TB sitting in your hand. I double check mine with an ohmmeter after everything is back together and linkage hooked up.
--
Bob (son's 81-244GL B21F-M46, dtr's 94-940 B230FD, my 83-244DL B23F-M46, 89-745(LT1 V8), 98-S90, 77MGB and four old motorcycles)

Have a look at http://www.brickboard.com/FAQ/700-900/EnginePerformanceSymptoms.htm#PoorPerformanceIdleSurgeandHuntDirtyThrottleBody. The procedure is the same for 200 series.

The throttle may just be sooty in which case it will clean up easily. But it will more than likely be kind of gunky in which case it will require a bit more effort. But not much.
--
'80 DL 2 door, '89 DL Wagon

three bolts, need new $1 paper gasket, use only throttle body cleaner. I usually just use some paper towels and soak it a number of times. Be careful not to let the fluid ruin your throttle position sensor. Don't mess with the sensor in way of adjustment.

Where is a source for the gasket? I would like to do this over the weekend?

Thanks again.

NAPA# TH2801 about $1
--
'75 Jeep CJ5 345Hp ChevyPwrd, two motorcycles, '85 Pickup: The '89 Volvo is the newest vehicle I own. it wasn't Volvos safety , it was Longevity that sold me http://home.no.net/ebrox/Tony's%20cars.htm

Try your local auto parts shops.
You can cut one yourself if they sell a gasket kit.

After your done, you will be glad you did it.


joseph