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Timing SEVERELY Retarded (40ATDC) in order to run?
1984 2.8L Auto F-Body E2SE Carb 180k mi, gets (got?) 25mpg, NO codes, smooth high vacuum, but timing @ 40ATDC:
As preventative maintenance I recently replaced the intake manifold gaskets and timing chain set as well as the balancer. I also replaced the EGR valve and installed a new set of plugs. The ignition wires are only a few years as is the cap and rotor.
Prior to all of this the car ran fine and got 25mpg. There was a little looseness to the old chain but not bad. There was some notable corrosion in the intake manifold water port gasket area so this was a well timed project in that regard at least. But unfortunately things are worse off overall.
Upon re-installing of everything I'm finding I can't get the timing mark ONTO the tab at all. In fact the mark is barely visible. I'd estimate it to be about 30 or 40 degrees ATDC (retarded). Let's say 40ATDC is what it is idling at. Timing mark is correct (has not shifted on balancer). This was true before and after the chain replacement.
When I try to slowly work the distributor rotation to where I even 'approach' TDC on the mark - the engine starts idling horribly and eventually will not run at all the closer to TDC I get.
Question: With the 4-wire EST connector disconnected - will the ECM go into a 'dumb' or default mode? Or can other subsystems still potentially affect things? Like the MAP Sensor? TPS? ECM Temperature Sensor? Mixture Control Solenoid? etc...?
1984 2.8L Auto F-Body E2SE Carb 180k mi, gets (got?) 25mpg, NO codes, smooth high vacuum, but timing @ 40ATDC:
As preventative maintenance I recently replaced the intake manifold gaskets and timing chain set as well as the balancer. I also replaced the EGR valve and installed a new set of plugs. The ignition wires are only a few years as is the cap and rotor.
Prior to all of this the car ran fine and got 25mpg. There was a little looseness to the old chain but not bad. There was some notable corrosion in the intake manifold water port gasket area so this was a well timed project in that regard at least. But unfortunately things are worse off overall.
Upon re-installing of everything I'm finding I can't get the timing mark ONTO the tab at all. In fact the mark is barely visible. I'd estimate it to be about 30 or 40 degrees ATDC (retarded). Let's say 40ATDC is what it is idling at. Timing mark is correct (has not shifted on balancer). This was true before and after the chain replacement.
When I try to slowly work the distributor rotation to where I even 'approach' TDC on the mark - the engine starts idling horribly and eventually will not run at all the closer to TDC I get.
Question: With the 4-wire EST connector disconnected - will the ECM go into a 'dumb' or default mode? Or can other subsystems still potentially affect things? Like the MAP Sensor? TPS? ECM Temperature Sensor? Mixture Control Solenoid? etc...?
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