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Toyota Tundra Engine Issues

84 messages,  Last post on Jun 13, 2013 at 5:32 AM

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Messages Page 9 of 9

#80 of 84 Re: the best tool for removing the O2 sensor [mikon] by bigrob215275

Nov 07, 2012 (7:55 pm)

Replying to: mikon (Jun 12, 2008 3:04 pm)
I have had trouble with 2005 Toyota Tundra engine dying with codes P0171 and P0174 lean fuel on both banks at 60,000 miles. 5 Toyota Dealerships later Ive replaced the MAF spark plugs, both catalytic converters and they say it may be O2 sensors at $400 times 2 and 150 times 2 for the rear ones. This truck has almost gotten me killed more than a few times because engine dying in heavy traffic. Luckily I hope I found an independant technician who in 15 min ran an amp ramp test on the fuel pump. It failed and was aflat line aqt 4 amps when it should vary between 4 and 10 or 12 and down again. Dealers test fuel pressure but not volume of fuel which he says this does. So we'll find out tomorrow.

#81 of 84 2005 Toyota Tundra P0171 P0174 codes by bigrob215275

Nov 07, 2012 (8:03 pm)

Replaced on their advice the mass air fuel sensor MAF, the spark plugs, both catalytic converters and they washed out the air plenum all at 60,000 miles. After the cats were replaced it ran okay for a couple of months and then 1500 miles from home it does the same things again. Dealership suggests new O2 sensors but an independant tech ran an amp ramp test of the fuel pump and he says that it has pressure but no volume because the metered amps were a flat line at 4 amps instead of varying from 4 to 10-12 back to 4 again. So they will show me tomorrow whether it solves the problems I and others have had.

#82 of 84 P0171 P0174 Toyota Tundra 2005 codes by bigrob215275

Nov 08, 2012 (2:49 pm)

As per my last message the amp ramp test is the correct test. The NAPA Technicians at TUNEX took the fuel pump out and replaced it.
I took the fuel pump apart and found it plugged with coffee grinds. Thanks evil ones.
Replacing the pump fixed the engine dying and no power problem as proved by the scans which showed the amps at 7.5amps up to 9 amps and down again. Another scan proof showed the short time and long time fuel numbers at near 10 and over 30 respectively the injectors trying to compensate for lack of fuel. Those numbers came down to under 3 and 10 respectively and going down more as the averages count the new improved low numbers. The new pump installed actually led to the engine light going out by itself as it recognized the repair.

#83 of 84 toyota tundra by pvtcable

Apr 01, 2013 (10:36 am)

the problem maybe with the flex fuel.I have had to resort to the lemon law and get an attorney. Toyota knows of the condition problem but refuses to tell anybody about it when they're selling these cars. They will not stand behind it they will not let you off the least it will not give you a replacement vehicleregardless of how much you spent or how many Toyotas you driven in the past.there is some type of problem with the mixture of oxygen in fuel. It's a software problem they say. They know about it but they do not have a fixed and not telling any new customers. When the problem happens it makes the truck run rough, start had and hesitates during acceleration and when using passing gear so be very careful. the only cure so far anyway is do not drive for less than 5 minutes at a time, do not run on less than a quarter of a tank of fuelonly drive in temperatures of over 50 degrees.the problem also happens after the seventh or eighth fill up.they may offer to make a monthly payment for you or to extend your warranty but that does not fix the problem. When you drive as much as I do the car has to go in for service about every 2 weeks.I would check this out carefully before you sign anything. Or at least look into the lemon laws first

#84 of 84 tundra check engine light by dbagz1959

Jun 13, 2013 (5:32 am)

i have a 2001 tundra, bought it new, 83000 miles, when it gets to operating temp it develops a miss while at idle, and the check engine lite comes on, seems fine when crusing. took it to one shop and they said the code showed that some of the plugs were loose, repaired that, check engine lite was now out. five days later same problem. took it to dealership, same codes for plugs.they replaced all the plugs, problem fixed. two weeks later same problem. any one have this problem or any ideas what is causing this? thanks for your sugestions.

Messages Page 9 of 9

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