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12-16-2008, 11:10 AM
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#1
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Banned
Join Date: Mar 2007
Location: coumbia. nj
Posts: 1,317
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92 yukon has no powah...ideas?
this is our towing vehicle, never really had problems besides th etrans which was just rebuilt maybe 5k miles ago. we go to drive it and it cant get out of its own way. not even towing anything you cant get up a hill. it has a bad exhaust leak thru the muffler but that wouldnt make it have no power would it?
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12-16-2008, 01:41 PM
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#2
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Join Date: May 2006
Location: Midland Park, NJ
Posts: 1,389
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clogged cat?
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12-16-2008, 05:25 PM
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#3
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11 second club / Moderator
Join Date: Aug 2004
Location: West Berlin, NJ
Posts: 7,148
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350 TBI?
SES light? Timing? Bad gas? Cloggeg cat like he said?
__________________
2001 Trans Am WS6 •SLP Loudmouth II •UMI Suspension •12.857 @ 109.57
1996 Trans Am WS6 •Pacesetter Longtubes •Strange 12 Bolt •Spohn Suspension •11.152 @ 123.85
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12-16-2008, 08:09 PM
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#4
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Banned
Join Date: Mar 2007
Location: coumbia. nj
Posts: 1,317
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350 tbi is correct.
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12-16-2008, 08:30 PM
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#5
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Join Date: Dec 2008
Posts: 23
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Symptoms?
Does it back fire?
Does it sputter?
Does the engine remain smooth or does it buck?
Does it have a stable idle?
What does the exhaust smell like?
Is the oil clean?
Need more info than it just doesn't have power. There are so many ways an engine can be down on power that all anyone could do is guess unless more detail is given.
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12-17-2008, 08:15 AM
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#6
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Banned
Join Date: Mar 2007
Location: coumbia. nj
Posts: 1,317
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still seems smooth. when going up a hill it will downshift to 3rd and sometimes to second and it slams into second hard. no back firing.and i havent smelled tghe exhaust.
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12-17-2008, 09:36 AM
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#7
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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When was the last tune up? Fuel filter, PCV, timing checked?
What grade gas are you running? I had a 93 PU and when prices hit $2.50 a gallon a switched from premiun to reg, and found out quickly the #&)%*?^ thing would only ran on Premium no matter where I put the timing. When runnning reg it would start to ping and overheat when going up grades, no way I could tow with it if running reg!
__________________
93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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12-17-2008, 02:26 PM
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#8
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Banned
Join Date: Mar 2007
Location: coumbia. nj
Posts: 1,317
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we always ran regular, always ran fine till the most previous time we started it.
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12-17-2008, 02:32 PM
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#9
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Banned
Join Date: Mar 2007
Location: coumbia. nj
Posts: 1,317
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i thought tune up also but it doesnt seem like a tuneup
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12-17-2008, 02:42 PM
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#10
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Join Date: May 2006
Location: Midland Park, NJ
Posts: 1,389
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Did you even check to see if the cat was clogged?
What is the fuel pressure on the return side of the TBI?
Answer these questions before you keep guessing.
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12-17-2008, 10:24 PM
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#11
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Banned
Join Date: Mar 2007
Location: coumbia. nj
Posts: 1,317
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i havent had time to work on it. once we have a minute we are going to drill holes in the cat to see if that what it is. im thinkin it may be that cuz we park it in the back of the yard and we think mice may have tunneled into the exhaust and made a nest there....
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12-17-2008, 10:30 PM
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#12
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NJFBOA Co-Founder
Join Date: Jul 2004
Location: All up in your kool aid!
Posts: 12,235
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Does the exhaust make a hissing noise when you stand on the gas? That is a sign of a clogged exhaust. If the cat is done the exhaust will smell like rotten eggs.
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12-18-2008, 07:08 AM
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#13
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NJFBOA Supporting Sponsor
Join Date: Feb 2006
Location: HULMEVILLE, PA
Posts: 2,023
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So you are going to destroy the cat to see if it is ok? Isnt that like cutting off your toe to see if it is infected?
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JSSPEEDANDCUSTOM.COM
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12-19-2008, 09:36 AM
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#14
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Banned
Join Date: Mar 2007
Location: coumbia. nj
Posts: 1,317
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its rusted as it is so itll need a new one and i get free/discount parts.
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12-20-2008, 07:22 AM
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#15
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NJFBOA Supporting Sponsor
Join Date: Feb 2006
Location: HULMEVILLE, PA
Posts: 2,023
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then why bother with drilling anything? just replace it if you suspect it.
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JSSPEEDANDCUSTOM.COM
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12-20-2008, 08:58 AM
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#16
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Banned
Join Date: Mar 2007
Location: coumbia. nj
Posts: 1,317
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we dont have alot of money atm so we are just going to try it and see if thats it before we go replacing stuff.
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12-20-2008, 09:12 AM
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#17
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BadMod
Join Date: Aug 2004
Location: hamilton, nj
Posts: 8,889
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Quote:
Originally Posted by Slo86Bird
its rusted as it is so itll need a new one and i get free/discount parts.
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Quote:
Originally Posted by Slo86Bird
we dont have alot of money atm so we are just going to try it and see if thats it before we go replacing stuff.
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eh?
__________________
So much stupid, so little time.
Quote:
Originally Posted by 79CamaroDiva
It started before I drove your car. I just have to look at it the wrong way and your car poops parts.
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Mercerville MotorSports, LLC
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12-20-2008, 10:34 AM
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#18
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NJFBOA Supporting Sponsor
Join Date: Feb 2006
Location: HULMEVILLE, PA
Posts: 2,023
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My thoughts exactly Mike. Either the cat is free or it isnt.. Plus once the hole is drilled the cat will need to be replaced anyways.
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