Question about Buick Enclave

1 Answer

My 2008 Buick Enclave CXL, V6 Automatic has a problem when trying to increase speed going up a grade or going to the passing gear. First it hesitates as you press on the accelerator then it surges ahead. I have been told to have the GM Service people check the TPS (Throttle Positioning Sensor) they say the test proves it is ok but they test it on a trial drive and I was told they don't even need the motor running to test that sensor. They have upgraded the computer software having to do with downshifting but that didn't fix the problem. We are from Texas and temporairly living in PA where there are many more hilly highways and this problem occurs more often up here.

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Buick Master
  • 6,826 Answers

I happen to live in Pennsylvania where it is indeed hilly. The TPS can be checked by an engine analyzer or scanner for continuity of resistance increase as you press the pedal down further until it hits 100% with a minimum of 5% when your accelerator pedal is not depressed.

If the engine hesitates and then surges ahead, this points to a possible tune up problem. But, if you have no misses on the OBDII system at the dealer (and that's where a late model car should go) and no service engine soon light then this is certainly a mystery.

Nowadays, they can modify the characteristics of the computer's software to downshift in hopes that the mechanical advantage can overcome any initial hesitation. But, you're saying this is not good enough.

How many miles does it have? Have you had it tuned up regularly?

Posted on Jul 16, 2010

  • hatten99 Jul 16, 2010

    My Enclave has 53K miles. I had the local dealership analyze the problem 2 weeks ago. Their reply was GM is working on the on it, which is a common problem, but a servicing of the enjectors (for $99) may help!

  • Duane Wong
    Duane Wong Jul 16, 2010

    Walmart can add fuel injector cleaner directly for a lower price, I forget what, but it's like under $75 I believe.

    You can add injector cleaner to the gas tank and pay $5 to $7 for the concentrated STP fuel injector and fuel system cleaner, available where you buy gas, or at Walmart or auto parts store.

    I wish you luck in fixing this problem.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

My 08 bucik enclave cxl when you try to start it just speeds . Then after 3 or 4 time it starts what could be the problem

Do you mean that on the first few attempts the starter runs but doesn't engage the engine to turn it over? If so, you have a bad bendix in the starter or there is something preventing the bendix from moving fully into the flywheel engage position.

Feb 03, 2017 | 2008 Buick Enclave

1 Answer

How do I change the output transmission speed sensor on a 2008 Buick Enclave?

Well.. first you might want to put the vehicle on jack stands... because that unit is on the bell housing of the transmission. And it's probably going to be up against the fire wall side of the vehicle...

Aug 29, 2016 | 2008 Buick Enclave

1 Answer

How can I remove a second row captain's seat?

That is in the owner's manual. If you do not have it go to the GM owner's site and download the owner's manual it is free.

Apr 05, 2016 | 2012 Buick Enclave Base 4dr SUV 3.6L V6...

1 Answer

Will a 2008 liberty engine work on my 2012?

short block
or long with all manifold.???????
the 3.7L
fit , work, run, run perfect and pass smog? (all diffrent)!
in some states they check engine serials and dont allow, down grades. (calif is one)

Apr 20, 2015 | 2012 Jeep Liberty Sport 4dr SUV 3.7L V6...

1 Answer

Buick Enclave will occasionally at a stop rev up to between 2000-4000 rpm

Three possible reasons for this are
1. You have a vacuum leak
2. The throttle position sensor (TPS) has gone bad
3. The idle air control valve is bad or blocked up.

May 01, 2014 | 2012 Buick Enclave Base 4dr SUV 3.6L V6...

1 Answer

Changing spark plugs on 2008 buick enclave

On many front drive V6 engines it is easier to change the plugs from under the car....... easy may not be the correct word but at least you can get them out.

Mar 16, 2014 | 2008 Buick Enclave

1 Answer

Buick enclave navigation disc not working

maybe the dvd lens broke. to be sure try it with a new dvd disc.

Nov 27, 2013 | Buick Enclave Cars & Trucks

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

762 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts


Level 3 Expert

76649 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8518 Answers

Are you a Buick Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides