Last post on Oct 18, 2013 at 2:23 PM
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Toyota 4Runner, SUV
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#2342 of 2607 2001 4Runner - Head Gaskets and Injector issues
Jul 25, 2008 (1:19 pm)
Problems with my 2001 4runner. Had the 90k service done. Replaced plugs (6), water pump, timing belt etc. A couple of weeks later it ran rough and the check engine light came on. I took it back to the mechanic and they said the injector wires shorted and needed to be replaced. It ran fine for a few weeks, but then I almost ran out of gas and it immediately started running very rough and the check engine light came on. I took to the same mechanic and they scanned and said there was a misfire code P0300 and that one of the fuel injectors was clogged so they replaced it. They indicated when you get real low on gas, the engine may suck up sediment on the bottom of the tank which can clog injectors etc. I used Techron as they said the other injectors might go bad. Three weeks later, same problem, rough running, check engine light, same as the two times before. This time they scanned and another misfire code of P0300 so another injector was bad. They had to tear into the engine to get at it, expensive, and we agreed they would replace the other two injectors on that side at the same time since they had access to it and it seemed like the injectors had issues. Thought I would save money in the event the other 2 went out in the future. The bad injector seemed to have been fried from running hot.
Three days later, the exact issues came up again. This time they finally determined the head gaskets were bad. There was leaking of coolant which crystalized and then acted a s a sand blaster, damaging the plugs. Lots of carbon in the engine etc. The truck had not been running hot.
They said the timing belt was fine. They specifically checked. They said if it was a timing belt issue it would have been very sluggish. After calling numerous shops and Toyota, they determined it was a gasket leak that was between No. 1 and No. 3 which led to the coolant being in the engine which led to all of the carbon. They resurfaced the heads. The valves were OK so they donít think the issues were caused by the timing belt. They did adjust the valves. They also replaced all of the plugs.
Seems like the initial 90k service may have led to all the problems since they were dealing with the water pump etc. Seems like they may have simply misdiagnosed the injector issue (spark plug wire issue?) twice, but that was about $1,200 worth of misdiagnoses. Odd that it ran rough immediately after almost running out of gas.
Seems like at best, they misdiagnosed the problems 2-3 times and at worst, their original work caused the issues. Common for a 2001 Toyota 4 Runner to have bad gaskets, injectors? Is there any way I can legitimately establish any of that? What do you think? Just a series of problems that all started right after the 90k service.
#2343 of 2607 Re: 2001 4Runner - Head Gaskets and Injector issues [sbowl1]
Jul 25, 2008 (3:17 pm)
Don't know about all your issues. I do know the best way to mess up your fuel injectors is to run out of gas. The injectors suck up the dirt in the gas tank and get clogged.
It sounds like your mechanic is not familiar with Toyota 4Runners and are trying things at your expense.
When it's time for replacing my timing belt. water pump, transmission fluid, etc. at 100K it's going to the dealer.
MOST good dealers know what they are doing.
#2344 of 2607 2005 4.7L V8 Limited
Jul 30, 2008 (7:57 am)
In the market checking for good 4Runner deals and came across a great deal on a 2005 4.7L 32V V8 DOHC FI. Does anyone currently own this vehicle? This model has roughly 43,000 miles and comes with Navi and the JBL option. Any suggestions, comments, discouragements, etc. welcome.
#2345 of 2607 Re: 2005 4.7L V8 Limited [tvulich80]
Jul 30, 2008 (9:13 am)
We have a 2005 4runner like the one you are looking at, but no navi. It's my wife's car and she loves it. No trouble to date. My brother has a similar 2003 and loves it also.
#2346 of 2607 Re: 2005 4.7L V8 Limited [tvulich80]
Jul 30, 2008 (12:22 pm)
I had an SR5 V8 w/o JBL or Navi.
I had a few problems with it: car died 11000 miles. Computer just died for an unknown reason. The dealer replaced it but since the car was out of service for 21 days, I had the lemon law complaint ready to go. Also a few days after the warranty expired I had a filter in the exhaust system go for $600 and change and the serpentine belt replaced for another $600 and change (but that might have included a service visit, I can't remember).
That and the notorious transmission clunk (a heavy clunk when I would step on the brake at a stop light.
#2347 of 2607 Re: 2005 4.7L V8 Limited [ponytrekker]
Jul 30, 2008 (1:36 pm)
The clunk is from the axle/driveshaft, not the transmission.
#2348 of 2607 Re: 2005 4.7L V8 Limited [tvulich80]
Jul 30, 2008 (6:58 pm)
I have the Sport Edition - same year, motor, etc. These vehicles are bullet proof. I have almost 51K on it with no problems.
The only comment I have is that the front end seems to be hard to keep in alignment. Or is it my wife hitting every pothole?
#2349 of 2607 Re: 2005 4.7L V8 Limited [chuck1]
Jul 31, 2008 (8:53 am)
No alignment problems on my 2003.
#2350 of 2607 Re: 2005 4.7L V8 Limited [nedzel]
Jul 31, 2008 (9:59 am)
>>The clunk is from the axle/driveshaft, not the transmission.
#2351 of 2607 Re: 2005 4.7L V8 Limited [chuck1]
Jul 31, 2008 (12:35 pm)
Good to know. The one I am looking at has 43k miles, navi and JBL system - for $17000 asking price. Obviously the market is taking it's toll on these vehicles. The V8 doesn't seem to get much worse fuel economy than the V6. I figure there will be more to come, so I will offer $15k out the door. Thanks for the response!