4A-GE MK1 Engine TVIS, not sure if tis my Culprit or not. - Page 2

jsnod25 · 10-05-2009, 10:43 AM

Quote:

Originally Posted by PPiechocki

my '85 had the same problems. unfortunately, my culprit was A LOT more expensive. my timing belt jumped a cog and it caused my motor to blow a hole in the side of the #4 piston. $1,800 performance rebuild. i'm in the process of re-installing the motor right now, and i'm taking the extra steps...new vacuum hoses, new radiator hoses, new t-stat. i'm hoping that'll clear up the problem.

looks like i need to check my timing next...

jimmer411 · 10-11-2009, 08:18 PM

Also if you did the popular intake mod that everyone does, you could have water in the diagnostic plug. I had the same symptoms, very sluggish till 2900-3000 then it was normal. I dried out the connector and all is well.

Timing is also a good thing to look at.

YellowJacket · 10-12-2009, 05:05 PM

Jimmer, help me out here.. what is the relation between doing the intake mod, and getting water in your diagnostic port?

jimmer411 · 10-12-2009, 10:39 PM

The diagnostic plug is normally mounted by engine lid latch, with the cap on top.

If you dont remount the diag connector the cap can fill with water. The cap isnt sealed either, and with it dangling the cap will be on bottom.

Ive heard of it happening to others, and the symptoms were the same, sluggish till 2900-3000rpms. It finally happened to me, when I dried out the connector everything was fine.

scottohno · 11-13-2009, 02:39 AM

i have a check engine light that turns off at 85 mph in 5th gear (about 4000 rpm) maybe a little higher)). its an 86 NA. i was wondering if that would be my tvis. dont mean to hijack or anything, but i have been looking for an answer to this problem. my cooling system is bled and temperature and idle are ok, but i still have a light on. i have cleaned all air system parts when i installed my weaponR short ram intake. i have an aftermarket exhaust too. where should i start? O2 sensor?

efx · 11-13-2009, 03:03 AM

Guys, I used to get the check engine light while on the freeway when I had that stupid loud exhaust. So check to make sure there is no air leak anywhere on your exhaust, trust me, even after getting it fixed (welded), I kept getting a leak here and there until I got them all welded. Then I installed the whole oem exhaust and then I never saw that light again. So this is from my experience. As for the idle, check your intake hose. That one used to move every now and then, which let air in through it instead of the air filter. Just my 2 cents before you go assuming worst things. Like Aaron said, check the basic stuff first, then see if that will help.

scottohno · 11-13-2009, 04:12 AM

Quote:

Originally Posted by efx

Guys, I used to get the check engine light while on the freeway when I had that stupid loud exhaust. So check to make sure there is no air leak anywhere on your exhaust, trust me, even after getting it fixed (welded), I kept getting a leak here and there until I got them all welded. Then I installed the whole oem exhaust and then I never saw that light again. So this is from my experience. As for the idle, check your intake hose. That one used to move every now and then, which let air in through it instead of the air filter. Just my 2 cents before you go assuming worst things. Like Aaron said, check the basic stuff first, then see if that will help.

but my light turns off on the highway, not on. thats the weird thing.

te51levin · 11-13-2009, 01:34 PM

Quote:

Originally Posted by scottohno

i have a check engine light ... where should i start?

The car shows a CEL when some part of the car is worn, or failed, or out of adjustment. The first thing to do is to retrieve the codes stored in the ECU and see what they say.

Let me make this very clear: those codes absolutely do not tell you "here is a part that you must replace." What they really say is, "here is a circuit or system that is seeing a problem." Follow the diagnostic instructions in the BGB or manual - they are there for a reason!

Sorry if this is elementary, but a lot of people don't know where to start, and sometimes we need to be reminded to start at the beginning and use the tools that Toyota has given us.

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10-11-2009, 08:18 PM	#22 (permalink)
jimmer411 NA > Boost Join Date: Mar 2008 Location: Enumclaw, WA Posts: 112 Thanks: 1 Thanked 4 Times in 4 Posts My Google Map iTrader Rating: (0/0% )	Also if you did the popular intake mod that everyone does, you could have water in the diagnostic plug. I had the same symptoms, very sluggish till 2900-3000 then it was normal. I dried out the connector and all is well. Timing is also a good thing to look at.

10-12-2009, 05:05 PM	#23 (permalink)
YellowJacket 1985 16v NA 6-speed Join Date: Sep 2008 Location: Nashville, TN Posts: 415 Thanks: 8 Thanked 31 Times in 24 Posts iTrader Rating: (1/100% )	Jimmer, help me out here.. what is the relation between doing the intake mod, and getting water in your diagnostic port?

10-12-2009, 10:39 PM	#24 (permalink)
jimmer411 NA > Boost Join Date: Mar 2008 Location: Enumclaw, WA Posts: 112 Thanks: 1 Thanked 4 Times in 4 Posts My Google Map iTrader Rating: (0/0% )	The diagnostic plug is normally mounted by engine lid latch, with the cap on top. If you dont remount the diag connector the cap can fill with water. The cap isnt sealed either, and with it dangling the cap will be on bottom. Ive heard of it happening to others, and the symptoms were the same, sluggish till 2900-3000rpms. It finally happened to me, when I dried out the connector everything was fine.

11-13-2009, 02:39 AM	#25 (permalink)
scottohno control your hose Join Date: Feb 2009 Location: Fox Lake, IL Posts: 5,100 Thanks: 43 Thanked 93 Times in 83 Posts iTrader Rating: (7/100% )	i have a check engine light that turns off at 85 mph in 5th gear (about 4000 rpm) maybe a little higher)). its an 86 NA. i was wondering if that would be my tvis. dont mean to hijack or anything, but i have been looking for an answer to this problem. my cooling system is bled and temperature and idle are ok, but i still have a light on. i have cleaned all air system parts when i installed my weaponR short ram intake. i have an aftermarket exhaust too. where should i start? O2 sensor?

11-13-2009, 03:03 AM	#26 (permalink)
efx Cage Fighter Join Date: Apr 2009 Location: Los Angeles, CA Posts: 215 Thanks: 0 Thanked 4 Times in 4 Posts iTrader Rating: (1/100% )	Guys, I used to get the check engine light while on the freeway when I had that stupid loud exhaust. So check to make sure there is no air leak anywhere on your exhaust, trust me, even after getting it fixed (welded), I kept getting a leak here and there until I got them all welded. Then I installed the whole oem exhaust and then I never saw that light again. So this is from my experience. As for the idle, check your intake hose. That one used to move every now and then, which let air in through it instead of the air filter. Just my 2 cents before you go assuming worst things. Like Aaron said, check the basic stuff first, then see if that will help.