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 1990 Trooper Advice
#827424
07/29/07 06:39 AM
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Joined: Nov 2002
Posts: 115
OP
Wheeler
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I may have a chance to pick a very clean 1990 Trooper XS, Manual Trans, Basic Basic Basic, with a V6 for a few hundred dollars <img src="/forums/images/graemlins/smile.gif" alt="" /> and was wondering what problems or concerns to look for?
The engine starts right away but is idling high and just failed a Ca smog check. O2 sensor? or ? It has 150k miles on it but seems to have at least one wheel bearing making noise.
Is this a Isuzu engine or Mitsu? What size would it be, seems that it is TBody injected or ?
Any insight would be great!
Thanks,
Lygriek, aka Michael
2003 Montero XLS GEN III, 285/75R16 Pro Comp Xtreme MT's
Ironman Springs/KYB Shocks. Custom Rocker Protection and Bumper.
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Re: 1990 Trooper Advice
[Re: Lygriek]
#827425
07/29/07 03:36 PM
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Joined: Aug 2000
Posts: 4,868
Roll Me Over
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Actually, if it is a V6, it is a Chevy engine. It is the 2.8l, 60 degree engine.
The idle could be the O2 sensor, but more likely it is the IAC or a vacuum leak.
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Re: 1990 Trooper Advice
[Re: Jim_Paget]
#827426
07/29/07 05:21 PM
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Joined: Sep 2006
Posts: 43
Getting the Wheeling Fever
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Did 88 - 91's come with V6 and 5 speeds? I thought all of these years with 5 speed's were Isuzu 4 cyl.
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Re: 1990 Trooper Advice
[Re: BillW]
#827427
07/29/07 08:25 PM
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Joined: Dec 1999
Posts: 1,035
Body Damage is Cool
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'89 thru '91 for Troops with the GM 2.8 V6, available either with MUA 5-speed or GM 4L30E auto trans. BTW another possible reason for failing smog is a worn-out cat. Get a cheap Catco replacement in a larger diameter (2" or 2-1/4"), upgrade the exhaust to the same dia, and it'll run a lot better besides burning cleaner. O2 sensors are cheap; standard GM one-wire sensor available just about anywhere. Try an eBay search for Deals Galore........ed P.S. a Must Read for GM V6 owners: http://www.4x4wire.com/tech/60degreeV6/
'90 Troop 3.4 LS
'89 Troop RS (Has Valve Issues, needs Counseling)
HI, I'm Ed and I'm a Trooper-holic!
Keep On Troopin'......
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Re: 1990 Trooper Advice
[Re: Ed Mc]
#827428
08/09/07 06:10 PM
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Joined: Mar 2007
Posts: 114
Wheeler
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if it's idling high and failing smog, the very first thing to look for is vacuum leaks..
the MAP sensor can't regulate fuel correctly if there are vacuum leaks, plain and simple.
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Re: 1990 Trooper Advice
[Re: Shovel]
#827429
08/24/07 12:18 AM
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Joined: Nov 2002
Posts: 115
OP
Wheeler
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Thanks for all the advice! I was all ready to put it to good use, but... I got out bid on it here at the dealership. it was trade in and I was pretty interested in it at the estimated $800~$1000, as a toy, but it went for almost $2000, which is over wholesale KBB. Now there is a 95 here that I have my eye on.
Lygriek, aka Michael
2003 Montero XLS GEN III, 285/75R16 Pro Comp Xtreme MT's
Ironman Springs/KYB Shocks. Custom Rocker Protection and Bumper.
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