wont run after rebuild

allhotmustang · November 8th, 2011, 12:27 AM

hello all. i have a question i have a 91 gt convertible i just had rebuilt and the engine was bored 40 over keith black forged pistons, total seal rings, gt40 heads ported and polished,lower intake ported and polished,kenne bell 1.5, the person i had build this engine was a terrible builder he timed the cam wrong, messed up wiring etc. etc. the engine will start sometimes but will die on its own when compression is checked before startup the cylinder pressures are between 125psi and 115psi when the engine dies its at 115psi to 100psi, could someone please help me im spending alot of money in this engine on diagnostics.

Imran · November 8th, 2011, 12:28 AM

Hmmm....

well... ya did something wrong...

allhotmustang · November 8th, 2011, 12:35 AM

ya i know the mechanic that worked on this has cost me unnecessary money, any help would be greatly appreciated

ryanw · November 8th, 2011, 01:24 AM

do the wet?dry test. that will tell you if its the rings or the valves.

fogged306 · November 8th, 2011, 09:25 AM

Did you pull the timing cover and degree the cam? Having it off can cause low compression readings like that.

allhotmustang · November 8th, 2011, 10:06 AM

the mechanic didnt do the wet dry test, and i know for a fact he didnt degree the cam he just tried to align the timing gears,what is the procedure on performing the wet/dry test?

November 8th, 2011, 12:27 AM	#1
allhotmustang Newbie Join Date: Nov 2011 Posts: 3 iTrader: 0 reviews	wont run after rebuild hello all. i have a question i have a 91 gt convertible i just had rebuilt and the engine was bored 40 over keith black forged pistons, total seal rings, gt40 heads ported and polished,lower intake ported and polished,kenne bell 1.5, the person i had build this engine was a terrible builder he timed the cam wrong, messed up wiring etc. etc. the engine will start sometimes but will die on its own when compression is checked before startup the cylinder pressures are between 125psi and 115psi when the engine dies its at 115psi to 100psi, could someone please help me im spending alot of money in this engine on diagnostics.

November 8th, 2011, 12:28 AM	#2
Imran :) 01 Join Date: Dec 2007 Posts: 10,795 iTrader: 1 reviews	Hmmm.... well... ya did something wrong... __________________

November 8th, 2011, 01:24 AM	#4
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	do the wet?dry test. that will tell you if its the rings or the valves. __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

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November 8th, 2011, 12:35 AM	#3
allhotmustang Newbie Join Date: Nov 2011 Posts: 3 iTrader: 0 reviews	ya i know the mechanic that worked on this has cost me unnecessary money, any help would be greatly appreciated

November 8th, 2011, 09:25 AM	#5
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Did you pull the timing cover and degree the cam? Having it off can cause low compression readings like that.

November 8th, 2011, 10:06 AM	#6
allhotmustang Newbie Join Date: Nov 2011 Posts: 3 iTrader: 0 reviews	the mechanic didnt do the wet dry test, and i know for a fact he didnt degree the cam he just tried to align the timing gears,what is the procedure on performing the wet/dry test?

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