 96MM Cylinder and Piston Install, Running real bad after install |
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| DanPMan |
 Aug 7 2005, 06:40 PM
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#1
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Newbie  Group: Members Posts: 7 Joined: 3-June 05 From: Las Vegas, NV Member No.: 4,192  |
Just installed a 96MM piston and cylinder set into our 75 914-2.0. Fuel injection has been removed and replaced with a 32/26 DFV. Upon restart, there's a lot of backfiring both through the intake and exhaust. Runs like #$$#@%!!! with no power whatsoever. So far we've reset the carb per Weber initial set-up procedures and performed some initial timing. It idles, but hydrocarbons read at well over 8000 and the CO% was at 5 to 7%. So we're probably real rich. Probably should be rejetted...
Question.... when we installed the piston and cylinder sets, we also performed a valve seat rework (with a Neway by hand). All valves were verified to seat. Do you think the backfiring and no power condition is due to any other cause besides the carb and timing set-up????? |
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| SLITS |
Aug 7 2005, 09:21 PM
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#2
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
Ok budding M.E........hot spots in the cylinder head (preignition) from being to lean. If the engine still continues to turn, it still draws fuel and air 'cause a carb don't have no fuel cutoff.
Are the valves to tight also? |
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Posts in this topic
DanPMan 96MM Cylinder and Piston Install Aug 7 2005, 06:40 PM
bd1308 check your dwell..my car did the same thing right ... Aug 7 2005, 06:45 PM DanPMan Will do! I didn't have my dwell meter or t... Aug 7 2005, 06:55 PM bd1308 what sucks is that i actually lost my nice digital... Aug 7 2005, 07:01 PM MattR Did you set timing? You could be off. Loosen the... Aug 7 2005, 07:03 PM Al Meredith My experience tells me that backfireing means lean... Aug 7 2005, 07:04 PM seanery what about the cam? You've got nice pic piston... Aug 7 2005, 07:08 PM bd1308 backfire from carb=lean
backfire from exhaust=rich... Aug 7 2005, 07:08 PM Jake Raby Remove that carb
Grab the biggest hammer you can ... Aug 7 2005, 07:34 PM bd1308 i enjoy my single carb setup......i know another 9... Aug 7 2005, 07:44 PM lapuwali Aug 7 2005, 08:37 PM bd1308 i dont understand....
why would the system run-o... Aug 7 2005, 08:40 PM Bleyseng Takes Jakes,DD,Brads and everyone else and chuck t... Aug 7 2005, 09:19 PM Bleyseng Aug 7 2005, 09:24 PM bd1308 that was my other therory.
It just worked out bot... Aug 7 2005, 09:49 PM redshift popping.. i&o... and..
Yeah, valves.. may even t... Aug 7 2005, 10:00 PM rhodyguy that must be just about like a theory. Aug 7 2005, 10:59 PM |
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