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Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "Acceleration problem 2001 tundra", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
Acceleration - wait, no, transmisson problem 2001 tundra
Please help!!
The problem I have is hesitation/lurching during moderate to heavy acceleration. This problem started when I took it in for the check engine light - which at the same time they recommended throttle body cleaning and fuel inj service - which I did. The Check engine light was due to O2 sensors. They ordered parts and told me they would call me when they came in. While waiting for the O2 sensor parts to come in I noticed the acceleration problem. Went back to dealer and they installed the O2 sensor parts (apparently they came in) and said they found no acceleration problem. I took it back and made the service manager ride with me (and of course I couldn't duplicate the acceleration problem and neither could he). We were thinking it could be tranny so went ahead and did tranny service. Problem still exists. I have also carefully cleaned the MAF sensor to no avail.
Anyone have any ideas before I take it back again?
I am wondering what changes were made during the TBV and Fuel Inj service that might have caused this.
Thats what I would guess too. I had a similar problem that it seemed like someone was holding the truck then let it go..a very inconsistent power band but spark plugs fixed it.
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Please help!!
The problem I have is hesitation/lurching during moderate to heavy acceleration. This problem started when I took it in for the check engine light - which at the same time they recommended throttle body cleaning and fuel inj service - which I did. The Check engine light was due to O2 sensors. They ordered parts and told me they would call me when they came in. While waiting for the O2 sensor parts to come in I noticed the acceleration problem. Went back to dealer and they installed the O2 sensor parts (apparently they came in) and said they found no acceleration problem. I took it back and made the service manager ride with me (and of course I couldn't duplicate the acceleration problem and neither could he). We were thinking it could be tranny so went ahead and did tranny service. Problem still exists. I have also carefully cleaned the MAF sensor to no avail.
Anyone have any ideas before I take it back again?
I am wondering what changes were made during the TBV and Fuel Inj service that might have caused this.
Is there a CEL now?
__________________ ~Glenn~
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after cleaning the throttle plate and/or decarbing the valves I usually give it a good "Italian Tune Up" to blow all the crud that has just been loosened up out of the tail pipe. then change the plugs and clear the ECM of any codes.
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Believe me I've done plenty of "Italian tuning up" since this problem started. I never thought about changing the plugs. There has been no CEL thus far.
I thought about buying one of the OBD deals where you can record performance on a little plug-in module and then review it on your home PC to see if that showed anything - any suggestions on this tool?
A friend at work suggested fuel filter - I changed that but it didn't help any.
Is changing spark plugs a major ordeal? I've never done it on a vehicle with the individual coils on the plugs.
__________________ HAVE YOU DRIVEN OVER A FORD LATELY?
Team West SAWS (cranked up to 3.25")
Total Chaos UCA
ORS Manual hub kit
reese front receiver hitch
10,000 lb. winch on receiver hitch
Warn Quick connects front and rear
rear brake porportioning valve mod
3" perfomance products body lift
skyjacker AAL
wheelers urithane kit for front swaybar and steering rack
BFG AT's
Eagle101 wheels
CB radio W/ dual fiberglass 48" ant.
Have you tried changing the fuel filter? I was having problems with acceleration on my WRX. I took it to the dealer the other day, and they changed the fuel filter and now it rawks! Just a thought.
Check your fuel pulse damper. It has been stated that the stock setting is 1/2 turn, optimal setting is 3/4 turn. I experimented a good bit and my Tundra runs better a little more open. I did notice hestitation when the setting wasn't right.
Believe me I've done plenty of "Italian tuning up" since this problem started. I never thought about changing the plugs. There has been no CEL thus far.
I thought about buying one of the OBD deals where you can record performance on a little plug-in module and then review it on your home PC to see if that showed anything - any suggestions on this tool?
A friend at work suggested fuel filter - I changed that but it didn't help any.
Is changing spark plugs a major ordeal? I've never done it on a vehicle with the individual coils on the plugs.
The hardest part is mastering the technique of getting your plugs down in the valve cover and getting your socket back out. If you use a plug socket with the rubber holder in it it will stay on the plug and you will have to coax it out. If you use a standard socket it will drop your plug when you try and insert it.
The hardest part is mastering the technique of getting your plugs down in the valve cover and getting your socket back out. If you use a plug socket with the rubber holder in it it will stay on the plug and you will have to coax it out. If you use a standard socket it will drop your plug when you try and insert it.
Mitch
Get a length of 3/8 diameter fuel hose. you can push the end of the spark plug into one end and lower it in. Simply turn the hose and it will start the plug into the hole with no chance of stripping the threads if its not lined up. Pull it off and tighten with a socket.
OK....I've changed the spark plugs - that didn't work. Changed fuel filter - that didn't work. Adjusted fuel pulsation damper half a turn counterclockwise - that didn't work. Had transmission fluid & filter changed also. It still hesitates/stumbles on acceleration. Any other ideas?
I still think they screwed something up at the dealer when I took it in for the CEL originally on the O2 Sensors. I don't have a CEL now (since new O2 sensors were installed) and I'm miffed about what the cause is.
I'm almost to the point of taking it back to the dealer and telling them to keep it until it's fixed but thought I'd see if any of you had any other ideas.
Thanks thus far for the suggestions!!!
Did you clean your MAF? If not get some sensor cleaner from a parts store and pull it out and spray it off. Just be carefull it is fragile. Do a search if you need help there are plenty of posts on it.
Oh yeah, I knew I forgot something in the list...cleaning the MAF was one of the first things I did. I used some carb & choke cleaner (sensor safe) and gently swabbed with some Q-tips.
Do you think it may be a fuel pressure regulator problem? It seems to only be in the 2000 - 2500 rpm range that the problem occurs and under load - as in going up an on ramp to a freeway.
Oh yeah, I knew I forgot something in the list...cleaning the MAF was one of the first things I did. I used some carb & choke cleaner (sensor safe) and gently swabbed with some Q-tips.
Do you think it may be a fuel pressure regulator problem? It seems to only be in the 2000 - 2500 rpm range that the problem occurs and under load - as in going up an on ramp to a freeway.
Take it an AutoZone and get them to check it with their ODB and see if it is showing anything.
Acceleration - wait, no, transmisson problem 2001 tundra
, Air Box Mod, Pro Comp Boost GaugeTRD Supercharger, URD Fuel kit, URD 2.2 Pulley ALL GONE - Now Audi S4 Avant
