Built Series 1, have lots of KR - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-27-2013, 01:38 PM   #1
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Default Built Series 1, have lots of KR

I just got finished putting in y engine ive been doctoring up, I picked up a 95 Olds 88 supercharged engine for $300 with 150k on it, tore it down, new bearings, had the heads ported and opened up, new valve stem seals, new valve springs, all the gaskets replaced, ported intake manifold, cat delete, 180 therm, autolite 104 plugs, all repainted black and white, It runs great fired right off when we got to start it, but when driving it, it has no power at all, hooked up my scan tool and im getting up to 25-28 degrees of KR. What can I do now? Im running 93 octane,
its in a 1993 Park ave ultra, the block is a 95 with a 93 blower (stock pulley size) and 93 sensors
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Old 07-27-2013, 03:50 PM   #2
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Sorry I can't help with your engine problem, but man, I would love to see pics of your build.
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Old 07-28-2013, 01:25 PM   #3
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It seems to come and go, I drove it again nicely last night and sometimes it will throw tons of KR, other times none and it will SCOOOOOT
impressed my passenger with it when it actually took off
I have already done all the supporting things to it to prevent KR, my old stock engine had 0-1 KR all day long which wasn't a big deal
maybe im running lean under boost?
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Old 07-28-2013, 09:43 PM   #4
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Your going to have to find out what mod you did before getting all that KR.
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Old 07-28-2013, 10:50 PM   #5
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How does everything else on the scan tool look when you are getting all of that KR? Fuel trims all look okay?
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Old 07-29-2013, 12:56 AM   #6
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Update, hooked up my fuel pressure gauge, runs 35 ish at idle and around 52-53 at WOT with the regulator hooked up.
All that is done to it is ported heads and intake otherwise its stock (supercharger is stock with stock pulley) still is throwing crazy amounts of knock, but if I romp on it from a 32-35 mph roll it doesn't throw any, from a dead stop or a slow moving roll I get upwards of 30 degrees?? I put $20 of race gas (100 octane) in it and same thing, pulled off supercharger belt and then had no KR (also no power )
what does this tell you guys
My o2 sensor is working, fuel trim seemed ok, had my ase mechanic uncle whom I work with look at it and verified that everything seems to be in spec, im wondering if my intake port is to blame, my uncle did the heads, I did the intake, I wonder if I left some sharp ridges on it, the heads looked and felt incredibly smooth and he mostly worked on the exhaust side.
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Old 07-29-2013, 10:07 AM   #7
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You have to also consider the possibility this is false knock. Are all the bolts in place on the flex plate? Is anything rattling on the exhaust? When you took the belt off the suppercharger did the pulley spin freely with no signs of bearing noise? Are all the heat shields tight and secure?
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Old 07-30-2013, 07:24 PM   #8
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im wondering if it is false knock. My exhaust is 100% trash its old and rattley. i have an appointment tomorrow for an estimate to redo the whole system. TOday while driving the car even at 1/4 throttle it would spike to 25-30 kr on my snap on "brick" scanner.

I will retighten the torque converter bolts tomorrow
I did put a new fuel filter in with no change
I also have noticed a bang when i shift into reverse like possibly a bad trans mount on the rear? the front trans mount and pass side engine mount is new as of last week
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Old 08-02-2013, 02:40 PM   #9
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UPDATE
now its throwing up into the 20 degrees mark or higher even at 1/4 throttle?? I had it running great for a day then now its even worse? I let my brother drive the car to work and he "brushed" a curb and blew one of my tires but I got that fixed and now its doing this. The only mods are the heads/intake that'* it! Im thinking about switching back to a stock intake to see if that helps? I only have 1 day left until our annual cruise night and track day
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Old 08-02-2013, 03:42 PM   #10
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Rev your car in neutral/park (get that exhaust sytem to rattle) and see if you have KR.
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