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08-03-2014
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#21 |
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Join Date: Jan 2014
Location: Macomb twp,Michigan
Posts: 108
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Re: Sputtering
Is there a way to check if I have a bad coil?
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08-03-2014
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#22 | |
  
Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,797
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Re: Sputtering
Quote:
Testing coils |
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08-03-2014
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#23 |
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Join Date: Jan 2014
Location: Macomb twp,Michigan
Posts: 108
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Re: Sputtering
DIS wher is it located been reading around forum and keep mentioning this DIS,I know I sound like I'm dumb but I'm trying to find out this problem it's driving me crazy
 so with your help the faster I get this beast on the road and kick some azz
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08-03-2014
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#24 |
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Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,797
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Re: Sputtering
Distributorless Ignition System (DIS). The DIS is attached up under the Plenum with four bolts with Heat Sink White Grease (as batchman correctly points out in a following post) between the base of the DIS and the Plenum. The DIS is about 8 inches by 8 inches by maybe 1 inch. There are two electrical plugs in front and three in back with one BIG electrical plug having a capturing long bolt to hold it in place.
__________________
Left Clickable links  -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 08-09-2014 at 12:07 AM. |
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08-03-2014
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#25 |
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Join Date: Jan 2014
Location: Macomb twp,Michigan
Posts: 108
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Re: Sputtering
Thanks everyone for all the valuable info,I'm sure I'll find the culprit by weeks end. Just out of curiosity if it or was bad gas how long would it take for new fuel to kick in? Drove till 3 bars above reserve and filled it up( premium).
Last edited by TomZR1; 08-03-2014 at 06:41 PM. |
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08-03-2014
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#26 |
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Join Date: Jan 2014
Location: Macomb twp,Michigan
Posts: 108
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Re: Sputtering
Exhaust smells like someone lit off fireworks,if that helps any.
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08-03-2014
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#27 |
 
Join Date: Sep 2013
Location: Charlotte NC
Posts: 655
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Re: Sputtering
Tom,
Have you pulled the plenum yet? Can you verify all injectors have been changed? Don't worry about the DIS yet. When I posted that last-night I was thinking about another thread, and posted on yours. My apologies! Did you check for spark tracking on the plugs? Brad |
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08-03-2014
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#28 | |
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Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,797
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Re: Sputtering
The kicker is the fact this started all of a sudden.......
 Did anyone mention the MAP connection yet? Manifold Absolute Pressure Sensor (MAP) MAP Sensor Hose Fix TIPS MAP sensor hose disconnected x2 on the DIS for later. Quote:
__________________
Left Clickable links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 08-04-2014 at 12:51 AM. |
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08-03-2014
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#29 |
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Join Date: Jan 2014
Location: Macomb twp,Michigan
Posts: 108
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Re: Sputtering
No haven't pulled plenum,no tracking on plugs,injectors have been changed. I'm leaning towards coil,will do test with timming light test on wires & pull plug and check spark color. But before that will check fuel pressure,will keep you posted
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08-04-2014
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#30 |
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Join Date: Jan 2014
Location: Macomb twp,Michigan
Posts: 108
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Re: Sputtering
Ok did a fuel pressure test full throttle 49-50,I assume that's good. Next I'm going to remove plenum and test coil pck
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