 help needed - really loud backfire |
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| DarrenG |
 Aug 20 2008, 09:16 PM
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#1
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Newbie  Group: Members Posts: 46 Joined: 20-May 08 From: Liberty, MO Member No.: 9,078 Region Association: Upper MidWest  |
Here goes: Engine is back in after complete rebuild. 2.0 w/ DJet. It will crank, but won't start. It has a very, very loud backfire.
I pulled the timing plug. It's at TDC, dizzy has the #1 mark and rotor lined up at 10:00. When I installed the dizzy, I made sure it was at 12 degrees, with the small half on the outside. I think this has to be timing - but can't get a light on it until it's running. any suggestion? thanks |
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Replies(1 - 6)
| Mike D. |
Aug 20 2008, 09:38 PM
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#2
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OK, It runs now, and pretty good too! Group: Members Posts: 1,445 Joined: 3-January 03 From: Santa Clarita, Ca Member No.: 85 Region Association: None 
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Are you sure the plug wires are correct? I've done that one before....
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| DarrenG |
Aug 20 2008, 10:00 PM
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#3
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Newbie Group: Members Posts: 46 Joined: 20-May 08 From: Liberty, MO Member No.: 9,078 Region Association: Upper MidWest |
Plug wires are correct.
Reading the Haynes book, it says to set TDC to #1 on it's firing stroke. Could this be the issue? I am certain the short end of the distributor drive gear was to the outside - I believe that would have to be on the firing stroke. I'll pull the dizzy again, reset to TDC and make sure it's on the firing stroke. then try again. I'm trying to rule out other stuff before removing the distributor. Could anything else cause a really loud backfire? thanks |
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| Joe Owensby |
Aug 20 2008, 10:00 PM
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#4
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JoeO Group: Members Posts: 527 Joined: 7-January 06 From: Spartanburg, SC Member No.: 5,385 Region Association: South East States |
In addition to checking the plug connections, have you tried rotating the dizzy to see if you can find a sweet spot?
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| DarrenG |
Aug 20 2008, 10:04 PM
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#5
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Newbie Group: Members Posts: 46 Joined: 20-May 08 From: Liberty, MO Member No.: 9,078 Region Association: Upper MidWest |
QUOTE(Joe Owensby @ Aug 20 2008, 11:00 PM)  In addition to checking the plug connections, have you tried rotating the dizzy to see if you can find a sweet spot? A little. after the first monster backfire, I pulled the cap and made sure the rotor was lined up with the #1 mark when at TDC. Got another monster backfire, so I figure I have to be way off. also, the vac advance is pointing where it's supposed to. |
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| DarrenG |
Aug 22 2008, 02:44 PM
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#6
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Newbie Group: Members Posts: 46 Joined: 20-May 08 From: Liberty, MO Member No.: 9,078 Region Association: Upper MidWest |
Problem solved.
I was right. I installed the distributor drive gear with #1 at TDC - but not on the compression stroke. Pulled the distributor and drive gear, rotated engine until #1 was at TDC on the compression stroke, reinstalled and it fired right up. Thanks to all. This board has been a huge support for this rookie rebuild. Drive On! D |
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| championgt1 |
Aug 22 2008, 04:29 PM
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#7
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Don't embarrass me Filmore! Group: Members Posts: 2,680 Joined: 3-January 07 From: Tacoma, Washington Member No.: 7,420 Region Association: Pacific Northwest |
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