slugish before op-temp

Killa B · 12-20-2011, 03:28 AM

i have recently rebuild my 7mge, i have noticed it takes it about 15-20 minutes to reach op-temp. The engine runs really slugish when i drive it under op temp almost like ive lost 40% power its fine if its at op temp though. Also if it hasnt reached op temp and i turn the heat on it cools the engine down pretty quick i figured that was normal because its an older car. Im using Valvoline max life 10-W30 oil in it. does anyone know what could cause this. Is it just the engine hasnt broke in well enough yet?

cre · 12-20-2011, 07:12 PM

Test the AFM, ECU temp sensor, make sure the cold start injector isn't leaking and verify that both mechanical and ignition timing are set correctly.

Killa B · 12-20-2011, 11:28 PM

where is the ecu temp sensor located?

cre · 12-21-2011, 12:10 AM

There's a nice graphic in a post on the temp sensor located in the FAQ section.

87hilux7mge · 12-21-2011, 01:28 AM

first time ive heard of an over efficient cooling system with these cars. wondering if the thermostat is stuck open, at least as part of the problem.

sounds alot like a timing issue though. follow the aforementioned advice.

Killa B · 12-25-2011, 03:12 AM

okay so i apologize i probably should have said something about oil leaking only on exhaust side. Turns out i didnt tighten up the 3 plugs in the block. Tightened them down and its A LOT better motor even sounds more healthy. hope this can help someone in the future.

87hilux7mge · 12-25-2011, 06:59 PM

Little details man, glad u got it sorted tho. If anything new comes up, let is know.

12-20-2011, 03:28 AM	#1
Killa B 3" Exhaust Join Date: Oct 2010 Location: walhalla, sc Posts: 83	slugish before op-temp i have recently rebuild my 7mge, i have noticed it takes it about 15-20 minutes to reach op-temp. The engine runs really slugish when i drive it under op temp almost like ive lost 40% power its fine if its at op temp though. Also if it hasnt reached op temp and i turn the heat on it cools the engine down pretty quick i figured that was normal because its an older car. Im using Valvoline max life 10-W30 oil in it. does anyone know what could cause this. Is it just the engine hasnt broke in well enough yet? __________________ 1989 na turbo supra ~ 3ARacing exhaust 2.5" pipe no resinator, sports package

12-20-2011, 07:12 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Test the AFM, ECU temp sensor, make sure the cold start injector isn't leaking and verify that both mechanical and ignition timing are set correctly. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

12-20-2011, 11:28 PM	#3
Killa B 3" Exhaust Join Date: Oct 2010 Location: walhalla, sc Posts: 83	where is the ecu temp sensor located? __________________ 1989 na turbo supra ~ 3ARacing exhaust 2.5" pipe no resinator, sports package

12-21-2011, 12:10 AM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	There's a nice graphic in a post on the temp sensor located in the FAQ section. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

12-21-2011, 01:28 AM	#5
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	first time ive heard of an over efficient cooling system with these cars. wondering if the thermostat is stuck open, at least as part of the problem. sounds alot like a timing issue though. follow the aforementioned advice. __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.

12-25-2011, 03:12 AM	#6
Killa B 3" Exhaust Join Date: Oct 2010 Location: walhalla, sc Posts: 83	okay so i apologize i probably should have said something about oil leaking only on exhaust side. Turns out i didnt tighten up the 3 plugs in the block. Tightened them down and its A LOT better motor even sounds more healthy. hope this can help someone in the future. __________________ 1989 na turbo supra ~ 3ARacing exhaust 2.5" pipe no resinator, sports package

12-25-2011, 06:59 PM	#7
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	Little details man, glad u got it sorted tho. If anything new comes up, let is know. __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.

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