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| corvetteronw | Am I on the right track with this no start? | ||
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Senior Guru
 
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91 L98. This week I have been unable to get her to fire up. Pulled codes (none), checked spark (it's strong), checked timing while it cranked (right on).
Checked fuel pressure while cranking: goes from 0 to 68 lbs after 20 seconds of cranking. My book says it should be at 40-42 lbs while cranking. I checked #1 plug and it is wet and checked the oil dipstick (no fuel smell and not too high on dipstick). There is a gasoline smell after I crank on it for a while but I see no external leaks. Engine will not even cough. I think I have a bad fuel pressure regulator. It came with my replacement intake manifold so I have no idea how many miles are on it. When I replaced the O rings in the fuel rail recently the existing rings were intact but some of them were a bit mushy. I can get a fuel pressure regulator rebuild kit from Corvette Central for mid $80 range. I will check with the local NAPA store to see if they make one too. Does it look like I am on the right track or should I be looking elsewhere? Go Detroit Tigers! Getting ready to watch game 6 and hoping for the best. |
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Posted on: 2013/10/20 0:05
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A VETERAN IS SOMEONE WHO AT ONE POINT WROTE A BLANK CHECK MADE PAYABLE TO THE UNITED STATES OF AMERICA FOR AN AMOUNT OF UP TO AND INCLUDING THEIR LIFE. |
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| bogus | Re: Am I on the right track with this no start? | ||
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Grand Imperial Pooh-Bah
 
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gee... sounds like too much fuel pressure is blowing out the spark... in short, it's flooding.
TPiS also has a nice AFPR. |
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Posted on: 2013/10/20 0:07
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| corvetteronw | Re: Am I on the right track with this no start? | ||
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Senior Guru
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The AFPR is the "hat" and disc only. I need the rubber guts too as mine are rotted.
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Posted on: 2013/10/20 14:21
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A VETERAN IS SOMEONE WHO AT ONE POINT WROTE A BLANK CHECK MADE PAYABLE TO THE UNITED STATES OF AMERICA FOR AN AMOUNT OF UP TO AND INCLUDING THEIR LIFE. |
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| Matatk | Re: Am I on the right track with this no start? | ||
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Webmaster
 
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Order the diaphragm from tpis, they have the best price. Sounds like that is your problem.
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Posted on: 2013/10/20 16:54
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| Schrade | Re: Am I on the right track with this no start? | ||
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Elite Guru
 
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What's your static pressure? (before cranking) And pressure leakdown time?
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Posted on: 2013/10/27 14:57
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LT5, Marc Haibeck ECM module, AUTOMATIC!!! 
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| CentralCoaster | Re: Am I on the right track with this no start? | ||
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Senior Guru
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You sure your fuel pressure guage is good? Is this a diagnostic gage or something you leave on the rail?
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Posted on: 2013/10/27 22:37
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1985 Z51, ZF6 |
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| Frank | Re: Am I on the right track with this no start? | ||
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Senior Guru
 
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Fuel pressure is a bit too high but I'm thinking along the lines of either a bad Crankshaft or Camshaft Position Sensor. It will show a spark but a weak one.
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Posted on: 2013/11/21 22:50
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| bogus | Re: Am I on the right track with this no start? | ||
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Grand Imperial Pooh-Bah
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The old school L98 lacks both sensors...
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Posted on: 2013/11/21 23:03
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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