Weird starting issue

[Tech II]

You can clean it with it attached to the intake.....

[Neverendingpain]

No I didn't disassemble the throttle body but you could.

[Earl Ollila]

Info for those with the same starting problem as I had with am 2007 Rendezvous 110,00 miles. I took neverendingpain's advise and purchased a can of throttle body cleaner. I removed the rubber 4 inch diameter corrigated hose that connect the throttle body to the air filter. I spray cleaned the air temperature sensor inside this hose. I then sprayed the throttle body without starting the engine. I captured the dirty spray that ran out of the throttle body with a towel.( it was full of carbon soot and tar) I then started the car and as someone ran the engine at 2000rpm, I sprayed in 2 seconds intervales into the throttle body. I used about 3/4 of a large can.
I did this last Saturday. (today is Tuesday) The engine has not failed to start since and the problem of the starter continuing to turn after I released the key has ceased. Three cheers for neverendingpain. Thank you.

[Neverendingpain]

Congrats Earl glad to hear you are no longer suffering from what appears to be a common problem with these vehicles. Mine is still working as well. Now if the dealerships would spend five minutes doing what we did, maybe there would be more happy Rendezvous owners and less of these blogs complaining of this issue.

[jrozanc]

You know I'm not ultimately convinced the starting issue is fixed with the C305 connector issue. I'm going to take your approach and clean the throttle body. Thanks for the info!!!!!

Originally Posted by Neverendingpain

UPDATE...... After one year of owning this vehicle, I finally got sick and tired of the no start and poor gas mileage issues with my rendezvous, got off my butt and tried to diagnose this issue. My c305 connector looks as good as it did new. Fuel pressure was within spec, had good spark and no dtc's. I took off the air cleaner and inspected the maf sensor and throttle body. the maf looked good and clean but i sprayed some Maf sensor cleaner on it anyway and let it evaporate. Then I turned my attention to the throttle body. It was absolutely FILTHY. Thick black Varnish looking deposits all over that sucker. So I used some throttlebody/carb cleaner and cleaned all that nastiness away. Put it back together and disconnected my battery terminals. I cleaned and reinstalled them. Went inside the cabin turned my key and guess what????????? For the first time in a year it started all on it's own, no gas pedal needed. I just did these things 4 days ago. It has started every time since without needing the gas pedal. Today I put some techron in the tank to try and clean the injectors and combustion chamber. Now I hope my meezly 14.5 mpg will increase. I will continue to update. Hopefully this helps some of you out there. Good Luck Guys...

[Neverendingpain]

Here's a quick update guys, I've been driving around for a couple of weeks since I fixed my rend. My gas mileage has increased to 16.3 from 14.5. not bad , I was just hoping for more.

[Gilmour]

worked like a charm Thanks!!!!

[aleekat]

Was looking at Rendezvous and found an 07, low miles. Had already went through this forum looking for known issues. After picking it up, couple days later got the same symptoms. Starts and dies. Had to hold gas pedal. Went straight down and picked up a can of throttle body cleaner. Sprayed via the intake with a rag under to catch the runoff. Then had the wife hold the idle at around 2000rpm while I sprayed about half the can a few seconds at a time. So far haven't gotten the "start and dies" since.
Thanks

[caucasianamerican]

i have the same problem sometimes fails to start and continues to turn over after i stop trying but i also have been having trouble codes for the evap emission solenoid i was wondering if i cleaned the throttle body if that would have anything to do with it

[caucasianamerican]

did you have any trouble codes displayed before you did this?

[aleekat]

No codes on mine. When was your last tuneup?

[caucasianamerican]

Not due to tuneup but i have a emission vent valve solenoid code on I replaced gas cap and was just wondering if that code would have anything to do w the startup issue

[lpar12]

I have a 2005 Buick Terraza 3.5 that will turn but will not fire and start. Any one have any suggestions...please and thank you!

[aleekat]

Originally Posted by lpar12

I have a 2005 Buick Terraza 3.5 that will turn but will not fire and start. Any one have any suggestions...please and thank you!

Probably need to put this in the Terraza forum.

[lpar12]

Sorry and thank you!