jndnaps Posted February 9, 2011 Report Share Posted February 9, 2011 Thinking of cleaning the Throttle Body this week. The car has a hesitation when it's first started. It's been doing that for like a year now. No codes and usually does it when I first start it for the day (cold). I live on a small Cul-de-sac and usually when I get to the corner and stop, then turn left or right, it hesitates and I gotta hit the gas harder. Also notice now that it's sometimes getting hard to start. I've had this car now for like 6 years and it's never been cleaned. I never did it and came across this link on how to do it. Is this the right way? I've been told to do it with the car off.. I was thinking running like the link says and like I used to do on my carbed cars.. How to Clean a 1996 Deville Throttle Body Link to comment Share on other sites More sharing options...
Safari2000 Posted February 9, 2011 Report Share Posted February 9, 2011 Hesitation when cold could also be the temp. sensor, have you tested the EGR valve?? Link to comment Share on other sites More sharing options...
Ranger Posted February 10, 2011 Report Share Posted February 10, 2011 Could be fuel pressure too, but the TB needs to be cleaned anyway. Forget that link. You MUST do it with the engine off as you will have to block the throttle plate wide open. Then spray, scrub with a tooth brush and wipe with a rag until the TB bore and the back side and perimeter of the throttle plate are as clean as the front. When you are done, shove a rag as far in as you can to sop up any carb or TB cleaner that settled in the manifold. If it hasn't been done in 6 years, it's gonna take a little work. You'll see what I mean when you get a look at it. Link to comment Share on other sites More sharing options...
joeb Posted February 10, 2011 Report Share Posted February 10, 2011 fairly easy. remove MAF housing. 3 bolts? open butterfly and spray carb cleaner in throat area and wipe out with rag. i had a car that always would die on hot starts. turned out to be crud around butterfly. made IAC adjustments touchy. cleaned bore and problem went away. Link to comment Share on other sites More sharing options...
BodybyFisher Posted February 10, 2011 Report Share Posted February 10, 2011 My 96 occasionally would hesitate briefly cold but not often, its probably due to it being cold and in open loop. Hesitation can be caused by the TPS, but a code is set if it is intermittant. When bad it will give a symptom like the old carbs when the accelerator pump was bad Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
scott y Posted February 11, 2011 Report Share Posted February 11, 2011 Apparently Techron and ACDELCO P/N 88861012(Fuel SystemTreatment Plus) are the same thing..I bought a 591ml bottle today for $20 and administered it and the results are soon to see. Ido have positive feelings tho..maybe you should try some. Link to comment Share on other sites More sharing options...
scott y Posted February 11, 2011 Report Share Posted February 11, 2011 That is a Canadian P/N by the way.. it could be different in the States... Link to comment Share on other sites More sharing options...
rockfangd Posted February 13, 2011 Report Share Posted February 13, 2011 I might add that I neve use carb cleaner, I ony use TB cleaner. not good for the intake and the coating on the walls of theTB, and sensors. My 96 was very dirty and got poor mileage. Took me like an hour to clean mine and I drove it like i stole it. I still do and recently I pulled the MAF back off and still shiny. GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
cdgrinci Posted February 13, 2011 Report Share Posted February 13, 2011 Like 'rockfang' mentioned, don't use carburetor cleaner unless you know your intake does not contain a coated surface. Intake cleaners are safe for either coated or non-coated and work as well. Chuck '19 CT6, '04 Bravada........but still lusting for that '69 Z-28 Link to comment Share on other sites More sharing options...
BodybyFisher Posted February 13, 2011 Report Share Posted February 13, 2011 The best solution to use is the GM upper intake cleaner I use this, http://paceperformance.com/i-5131908-88861802-gm-top-engine-and-fuel-injector-cleaner-16-oz-container.html Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
jndnaps Posted February 14, 2011 Author Report Share Posted February 14, 2011 Hesitation when cold could also be the temp. sensor, have you tested the EGR valve?? No, don't even know how. Could be fuel pressure too, but the TB needs to be cleaned anyway. Forget that link. You MUST do it with the engine off as you will have to block the throttle plate wide open. Then spray, scrub with a tooth brush and wipe with a rag until the TB bore and the back side and perimeter of the throttle plate are as clean as the front. When you are done, shove a rag as far in as you can to sop up any carb or TB cleaner that settled in the manifold. If it hasn't been done in 6 years, it's gonna take a little work. You'll see what I mean when you get a look at it. Thanks! My 96 occasionally would hesitate briefly cold but not often, its probably due to it being cold and in open loop. Hesitation can be caused by the TPS, but a code is set if it is intermittant. When bad it will give a symptom like the old carbs when the accelerator pump was bad It only does it the one time. Usually the first start of the day. After that it's good to go. I might add that I neve use carb cleaner, I ony use TB cleaner. not good for the intake and the coating on the walls of theTB, and sensors. My 96 was very dirty and got poor mileage. Took me like an hour to clean mine and I drove it like i stole it. I still do and recently I pulled the MAF back off and still shiny. Yes, I'll use the TB cleaner. Thanks for the info. Link to comment Share on other sites More sharing options...
rockfangd Posted February 14, 2011 Report Share Posted February 14, 2011 I imagine yours will be as bad as mine was. I did mine because the previous owner never went far and the egr pintle seized shut. Ran like new once I got done GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
93SixtySpecial Posted February 14, 2011 Report Share Posted February 14, 2011 So does anyone use the GM top engine clean? Have it sucked through the brake booster vacuum line until it dies and let it sit for 5 min and then restart? I did that on my 02 STS once or twice, but I'm wondering if it is good or bad or neither. -Dusty- 2006 Cadillac DTS Glacier Gold Tri-Coat with 175,000 miles 1993 Cadillac Sixty Special Gold Mist with 185,000 miles Link to comment Share on other sites More sharing options...
BodybyFisher Posted February 14, 2011 Report Share Posted February 14, 2011 So does anyone use the GM top engine clean? Have it sucked through the brake booster vacuum line until it dies and let it sit for 5 min and then restart? I did that on my 02 STS once or twice, but I'm wondering if it is good or bad or neither. If you do this, I would run the engine at high RPM and be very careful doing this, there is not much room to make a mistake doing this cleaning method with the Northstar. Personally, I would NOT let the engine stall if at all possible, but in reality, I would never try doing this. IF you put too much solvent into the intake and POOL it, on startup or driveaway, you can pull that pooled solvent into a single cylinder as this GM tech did and hydrolock your engine driving the piston rod out of the side of the engine. I had a 96, it would do this hesitation occasionally, usually, I was pushing the engine when it was cold and it gave me sort of a 'flame out' which I am sure was a back fire though the TB, it only happened once and then it was fine and it did not happen often, the answer to me was to take it easier till it was warmed up A GM Tech caused this hydrolock because he pooled GM upper intake/engine cleaner and this was the result, GM replaced this customers engine A tech named IAN posted this, the name of the file is Hydrolock_UEC_into_intake_with_pool.jpg. Start using Techron at each oil change or once a month on fill ups Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
93SixtySpecial Posted February 14, 2011 Report Share Posted February 14, 2011 So does anyone use the GM top engine clean? Have it sucked through the brake booster vacuum line until it dies and let it sit for 5 min and then restart? I did that on my 02 STS once or twice, but I'm wondering if it is good or bad or neither. Start using Techron at each oil change or once a month on fill ups Wowza! Don't think I'm going to mess with that anymore! Where can I get Techron? I haven't seen it anywhere before. -Dusty- 2006 Cadillac DTS Glacier Gold Tri-Coat with 175,000 miles 1993 Cadillac Sixty Special Gold Mist with 185,000 miles Link to comment Share on other sites More sharing options...
BodybyFisher Posted February 14, 2011 Report Share Posted February 14, 2011 see this link for stations that include techron and you usually can buy techron in the US at parts houses. I dont think its available in canada, but dont quote me http://www.techron.com/ fuel system cleaner http://www.chevron.com/products/prodserv/additives/tcp.aspx Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
scott y Posted February 14, 2011 Report Share Posted February 14, 2011 AC/DELCO markets the same stuff as Techron,only under a differnt name: AC/DELCO Fuel System Treatment Plus. It's available at the dealer or any supplier of Delco products,here in Canada the P/N is #88861012. I paid $19.93 taxes included 20oz(591ml) bottle,it is rather pricey but man,it's good stuff! I know,Iknow,Snake oil,Miracle in a bottle....It works Great! Link to comment Share on other sites More sharing options...
BodybyFisher Posted February 14, 2011 Report Share Posted February 14, 2011 NOPE its not snake oil, it was recommended by the guru as regular care, its the ONLY fuel system/injector cleaner recommended by GM or the guru Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
93SixtySpecial Posted February 14, 2011 Report Share Posted February 14, 2011 NOPE its not snake oil, it was recommended by the guru as regular care, its the ONLY fuel system/injector cleaner recommended by GM or the guru That's good to know! I just picked up some of the AC Delco variant of the techron. I was going to our local AC Delco store anyway, so I figured I'd just pick it up there. I have a full tank right now, but I won't on Wednesday, so I'll try it out then. -Dusty- 2006 Cadillac DTS Glacier Gold Tri-Coat with 175,000 miles 1993 Cadillac Sixty Special Gold Mist with 185,000 miles Link to comment Share on other sites More sharing options...
scott y Posted February 14, 2011 Report Share Posted February 14, 2011 I know it indicates on the bottle to add when the tank is nearly empty,but I had 3/4 of a full tank top tier Shell 93 octane, and just poured it in... Link to comment Share on other sites More sharing options...
winterset Posted February 15, 2011 Report Share Posted February 15, 2011 Nothing wrong with using a little TB cleaner on the Air intake mechanisms. Seems the PCV breather gums it up. looked like tar when I cleaned mine for the first & only time about 5 - 8 years ago. never did it again. No sense on spraying the inside with fluid & causing that goo to run thru your engine. I don't see the damage of leaving that goo stuck to the walls of the intake. I believe the biggest cause of the goo is overfilling the crankcase (checking when cold), and the blowby gets sucked into the TB. Link to comment Share on other sites More sharing options...
BodybyFisher Posted February 15, 2011 Report Share Posted February 15, 2011 According to the guru, the goo seen in the throttle body and intake is EGR gases that condense in the intake, over time that goo is created, it is completely harmless and if you clean it out, it will be back in no time Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
scott y Posted February 15, 2011 Report Share Posted February 15, 2011 Well, that's good. It must not have a way of seeping down into starter valley...or should I say, The Valley of The Starter... Link to comment Share on other sites More sharing options...
Ranger Posted February 15, 2011 Report Share Posted February 15, 2011 That "goo" is actually a combination of EGR AND crankcase gases from the PCV system that settle out once the engine is shut down. Nasty but harmless. Link to comment Share on other sites More sharing options...
scott y Posted February 15, 2011 Report Share Posted February 15, 2011 Perhaps frequent PCV should be in order..they're only $5 from Delco.. Link to comment Share on other sites More sharing options...
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