Question about 1997 GMC Yukon
At about 2000 rpms my engine has a vibration feels like it is loosing fuel but it is using almost three times the fuel. it used just under a quarter tank to drive 36 miles. and after i drive at highway speeds for more than 15 min or so my transmition shifts into 2nd hard
It could be a couple of different issues going on, first I would check to make sure the engine does not have any type of vacuum leak. I check my vehicles with carb cleaner from Wal-mart, the cheap stuff. But be careful! It is very flammable, with the engine running at a idle, spray it in short bursts around the intake and vacuum lines, if there is a leak the engine will either idle up or down. Also, have the computer scanned at your local parts store and see what codes come back. When was the last time it had a complete tuneup? Hope this helps.
Posted on Nov 26, 2013
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Posted on Jan 02, 2017
get a moto vac cleaning done on engine that will clean all injectors and test fuel pressure should cost 100 or a little more fuel savings will pay it back in no time moto- vac cleaning
Posted on Jun 22, 2009
Does the trany fluid smell burnt? Might want to have the trany flushed - torque converter too - and replace the filter in the trans. FYI you may know this but it is not recomended that overdrive be enabled when pulling a trailer - especially a heavily loaded one. Does your town have lots of hills - this is an added stain on the trany.
Posted on Nov 18, 2010
You'll need to check the circuit from the fuel pump relay back to the pump. The computer grounds the relay.
If the pump is running the filter could be clogged.
Posted on Sep 25, 2012
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