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'79 Midget backfire

To: spridgets@autox.team.net
Subject: '79 Midget backfire
Date: Tue, 29 May 2001 21:27:31 EDT
79 Midget built to US & Canada emissions standards. 
Distributor is a 41697B
Carburetor is a 45DE4 with 44A Jet needle
Runs rich and am unable to lean it down. Jet needle at end of adjustment. 
Violent backfires on sudden declaration at or above 2500 rpm.

Catalytic convertor is hollow. The air pump appears to be working. Has a new 
air filter.
Timed at 10 degrees TDC. EGR valve seems to be working. Choke spring and 
valve appear to be working. The deceleration diaphragm is in tact.

I can find no vacuum line leaks. The oil filler cap seals well, good valve 
cover gasket. Cannot find any air leaks between the carburetor & manifold or 
in exhaust system

Marc Derenzy
'79 Midget
74 MGB



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