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  1. R

    98 Tahoe crumby fuel injection

    My fuel injection is the lousy Multi Port upgrade from the spider style. It might be an "upgrade" in GM's eyes but not mine. The long block was installed 3 years back from Jeg's, L31 crate motor. So, it's at least a flat top piston 350, 4 bolt main. The OEM fuel delivery starves the motor from...
  2. R

    L31 or L31R Crate engine question

    I have a 98 Tahoe. It has cracked both heads within 30,000 miles of the first mishap. Decided to buy a crate motor & have narrowed it down to GM #12530282 or 12530283. I can't tell the difference except the 283 is a four bolt main. Is there a meaningful difference? Will the new motor have...
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    98 Tahoe Cat's bad?

    Comedy of errors chain of events: Jan 2013 - CSPI went out, new MFPI installed $800 Jan 2013 - Cracked head dumping coolant into the exhaust - $2200 Dec 2013 - Threw code, major tuneup - $500 Threw another code en route home from repair shop. Returned to shop and the code read "right bank...
  4. R

    98 Tahoe 350 is a slug

    I purchased this vehicle used 2010. It has had the CSPI changed to MPFI. It has been a mechanical nightmare. It does have a 350 but it is not the 350's we used to build for street machines. My 92 GMC had the 350 with TBI. I wish this Tahoe ran like that GMC did. What kind of PCM and other...

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