1990 22re cold idle very fast

[smithoman]

My 1990 2wd pickup has a 22re with California emissions equipment. When the engine is cold it idles at a super high rpm. As the engine warms, the idle pulses until warm. The problem seems to be getting worse because "cold" is now anything under 100 degrees outside. I once read about a cold motor sensor that adjusts the timing increasing the idle to speed engine warm up. Any advice on this? It's driving me crazy!!

[jeffs94]

Check your coolant temp sensor. Along with the o2 sensor input, the CTS is another sensor thats helps put the computer into closed loop mode, and your idle should come down.

[smithoman]

Thank you very much for the info! I'm going to check that out over the weekend. It will be fantastic to get this problem fixed. I'll let you know how it turns out.

[Sidney]

About half of the ECU codes stored on the first & second generation EFI Toyotas don't show a constant blinking check engine light therefore you must pull the ECU codes and auto tranny computer codes to see if a fault is registered.
To pull the ECU codes:

All 1980-1995 and including 1995 EFI equipped vehicle allow you to find engine and related faults by pulling the ECU (computer) codes without the need for a handheld OBDII diagnosis scanner,the sites listed below have the fault codes needed to pull the codes and the instructions on how to do it:

http://www.off-road.com/toyota/tech/codes/index.html
http://www.geocities.com/MotorCity/P...ct/Engine.html
http://www.mad-mechanic.com/toyota/t...tml#obtaincode
http://www.freewebs.com/th3duke/22RE-ECU.mht
http://www.troublecodes.net/Toyota/
http://members.igateway.net/~pscott/enginecodes.html
http://www.troublecodes.net/Toyota/
http://www.showmesome.info/hilux/inf...E/Page0096.htm
http://www.efisakh.narod.ru/at_toyota.htm
http://www.usatransdoctor.com/foreigntoyota.htm
http://www.autobook.co.kr/data_links...uble_codes.htm
http://www.ecutecparts.com/ccodes/toyota.html
http://www.autoshop101.com/forms/h27.pdf
http://autorepair.about.com/library/...bl-dtcs-36.htm
http://autorepair.about.com/library/...bl-dtcs-53.htm
http://autorepair.about.com/library/...bl-dtcs-71.htm
http://autorepair.about.com/library/...bl-dtcs-90.htm

Pulling the ECU codes is the first thing I do to diagnosis a problem thereafter I reset the ECU to see if the same problems show up and if so I then take voltage measurements both with the engine running and not and compare with the factory service manual,I also close the ignition switch after a cold engine and also after a warm engine and compare them with the factory service manual.This technique will completely isolate your problem without having to do trial and error and it is the technique I use when repairing tv's,vcr's,home/car audio.

Any public library in your area would have the Factory service manual,Haynes,Chiltons,Mitchells and Toyota repair books.
There is also free AutoZone service manuals at:

http://www1.autozone.com/servlet/UiB...pair_guide.jsp

For scanned pages of factory service manuals for other engines:

http://www.brian894x4.com/Scannedmanual.html
http://www.showmesome.info/hilux/info/manuals/1KZ-TE
http://toyoefi.freeyellow.com/manual.html
http://perso.wanadoo.fr/adherence.4x...techniques.htm
http://perso.wanadoo.fr/adherence.4x4/index.htm
http://www.asatraction4x4.cl/html/
http://www.grubinski.com/grubinski/manuals.html
http://www.hotrodder.com/kwkride/tech.html
http://www.autoshop101.com
http://www.mtv411.com/sitemap.htm

Free 2003 Toyota Tacoma Factory Service Manual download:

http://www.junglecode.com/toyota/tacoma/2003_fsm/

Sidney
Repairs tv's,vcr's,home/car audio out of my home
E-mail:sidneybek(at)yahoo.com
Dartmouth,Nova Scotia
Canada
1985 Toyota 4-Runner,22R-E,W56,RN60LV-MSEK,rusted rear step/towing chrome bumper with 241 000 KM

[jeffs94]

Originally posted by Sidney
About half of the ECU codes stored on the first & second generation EFI Toyotas don't show a constant blinking check engine light therefore you must pull the ECU codes and auto tranny computer codes to see if a fault is registered.
To pull the ECU codes:

All 1980-1995 and including 1995 EFI equipped vehicle allow you to find engine and related faults by pulling the ECU (computer) codes without the need for a handheld OBDII diagnosis scanner,the sites listed below have the fault codes needed to pull the codes and the instructions on how to do it:

http://www.off-road.com/toyota/tech/codes/index.html
http://www.geocities.com/MotorCity/P...ct/Engine.html
http://www.mad-mechanic.com/toyota/t...tml#obtaincode
http://www.freewebs.com/th3duke/22RE-ECU.mht
http://www.troublecodes.net/Toyota/
http://members.igateway.net/~pscott/enginecodes.html
http://www.troublecodes.net/Toyota/
http://www.showmesome.info/hilux/inf...E/Page0096.htm
http://www.efisakh.narod.ru/at_toyota.htm
http://www.usatransdoctor.com/foreigntoyota.htm
http://www.autobook.co.kr/data_links...uble_codes.htm
http://www.ecutecparts.com/ccodes/toyota.html
http://www.autoshop101.com/forms/h27.pdf
http://autorepair.about.com/library/...bl-dtcs-36.htm
http://autorepair.about.com/library/...bl-dtcs-53.htm
http://autorepair.about.com/library/...bl-dtcs-71.htm
http://autorepair.about.com/library/...bl-dtcs-90.htm

Pulling the ECU codes is the first thing I do to diagnosis a problem thereafter I reset the ECU to see if the same problems show up and if so I then take voltage measurements both with the engine running and not and compare with the factory service manual,I also close the ignition switch after a cold engine and also after a warm engine and compare them with the factory service manual.This technique will completely isolate your problem without having to do trial and error and it is the technique I use when repairing tv's,vcr's,home/car audio.

Any public library in your area would have the Factory service manual,Haynes,Chiltons,Mitchells and Toyota repair books.
There is also free AutoZone service manuals at:

http://www1.autozone.com/servlet/UiB...pair_guide.jsp

For scanned pages of factory service manuals for other engines:

http://www.brian894x4.com/Scannedmanual.html
http://www.showmesome.info/hilux/info/manuals/1KZ-TE
http://toyoefi.freeyellow.com/manual.html
http://perso.wanadoo.fr/adherence.4x...techniques.htm
http://perso.wanadoo.fr/adherence.4x4/index.htm
http://www.asatraction4x4.cl/html/
http://www.grubinski.com/grubinski/manuals.html
http://www.hotrodder.com/kwkride/tech.html
http://www.autoshop101.com
http://www.mtv411.com/sitemap.htm

Free 2003 Toyota Tacoma Factory Service Manual download:

http://www.junglecode.com/toyota/tacoma/2003_fsm/

Sidney
Repairs tv's,vcr's,home/car audio out of my home
E-mail:sidneybek(at)yahoo.com
Dartmouth,Nova Scotia
Canada
1985 Toyota 4-Runner,22R-E,W56,RN60LV-MSEK,rusted rear step/towing chrome bumper with 241 000 KM

Good info!