Coreys Riv with engine problems - 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 11-04-2007, 09:03 AM   #1
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Default Coreys Riv with engine problems

hear is my riviera,M62 charged, but its running rough. i was told that it was the intake gaskets, and what not. so i got my stuff, i have a Lower intake gasket, upper intake gasket,supercharger gasket, super charger, i have stuff for a tune up as well, auto lite 104s, PCV valve,royal purple 5w-30, stuff to do a full antifreeze drain and replace,MSD wires will be hear on monday. but from what im being told that it could be a clogged cat, the exhaust is in some very rough shape. so im not really sure what it could be. i will post the vid, watch it will the caution my mouth gets a little bit dirty , i was kinda upset about the car





http://www.youtube.com/watch?v=NWL3GkSy5Cw

any help would be great Thanks in advanced
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Old 11-04-2007, 09:13 AM   #2
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My first impression is something to do with the ignition system. Bad wire(*), bad coil pack, or really fouled plugs. Or maybe the plugs were changed and the wires were misrouted. Could also be a vaccuum line that has come off somehwere.
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Old 11-04-2007, 09:21 AM   #3
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i have my plugs and wires and coils will be hear on monday, by any chance would you know the correct gap for the plugs. i got 104s being that they run cooler, i was hoping they would help out

and thanks for the help
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Old 11-04-2007, 12:15 PM   #4
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I don't see anything in your signature to dictate 2 heatranges colder than stock, and that may cause further problems down the road. Let'* try to fix it rather than band-aid it.

You should be NO MORE than ONE heatrange colder than stock, and if you do that, you should gap at .055". I suggest staying with stock plugs for the time being and not introducing another variable.

As I suggested in your Intro post, I'd like to see if we can isolate some noise and accessories and hear the engine alone. Try starting the car with both belts removed for a few minutes. Don't run more than a few this way, as your water pump won't be circulating.

You can check the resistance of your plug wires with an ohmmeter, and you can check your coils in the same manner by using the procedure in TECHINFO. Ultimately, we need to start ruling some things out before we spend any money on repairs.
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Old 11-04-2007, 04:43 PM   #5
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thats why i got 104s the riv came with 605s
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Old 11-05-2007, 12:31 AM   #6
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Ignore the plugs for now. Run the engine with both betls removed and see if some of the noise goes away. If it does, install one belt at a time to narrow it down.

Do NOT run 2 heatranges colder on plugs until you're running a 2.3" pulley or smaller. If you are on the stock pulley, run NGK TR55 plugs at .055" gap.

Pull your plugs to inspect them and take a pic of them placed in order so we can see them. Do NOT replace them yet. We don't need more unneeded variables introduced into your mess right now, and you bought the wrong plugs.
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Old 11-05-2007, 09:05 AM   #7
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You mentioned having new parts that would come into today. When you swap the wires, double check that they are routed to the correct cylinders. It may also be worthwhile to check your battery cables for any corrosion etc. While his is most likely not the cause, a weak ignition system could be a possibility.
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Old 11-05-2007, 04:33 PM   #8
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i turned the heat to the garage on a few mins ago, these MSD wires looks crazy nice but my coils didnt come intoday. but i just hope the wires will fit, they didnt make any for the riv series 1 so i jsut ordered some for the GTP
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Old 11-05-2007, 06:25 PM   #9
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well i got the front plugs and wires changed, first off if you dont have MSD get them im a true beliver. they fit better and look better then stock. but any way i got some pics of the new MSD wires and the new and old plugs

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thanks summit racing

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i just remember that i forgot to resize them sorry
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Old 11-05-2007, 06:51 PM   #10
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I'll Bet that Bosch Platinum Plug is why that car was running like comeplete ****...

Wait till you get the New plugs and wires in there..

Not sure who put the Bosch Plats in that car but just remember, do not run Platinum plugs in a Forced Induction car.. Stick with Copper or Iridium...

Let us know how it turns out

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