The Mystery of the 91 Sovereign...
#1
The Mystery of the 91 Sovereign...
Hey everybody, Im Mark, and I have been working on this 1991 Jaguar Sovereign 4.0 for awhile now and i cant seem to get it running right...since august... lately i found out that it wont even start up unless i disconnect the coolant temperature sensor (very weird) I've replaced everything that might be causing it to stall, and when i do get it running i have to keep my foot on the pedal and then it starts popping through the intake, if i let go of the pedal, it stalls.... please help!
Everything here i replaced and checked...
New Fuel lines
New Fuel pump
New Fuel regulator
New Fuel filter
New Mass air flow sensor
New intake manifold gasket
New idle air control valve -(programmed)
New plugs & wires
Checked catalytic converter
Checked distributer
Cleaned throttle body
Cleaned injectors
replaced computer ECU
what can be causing it to do this?
Everything here i replaced and checked...
New Fuel lines
New Fuel pump
New Fuel regulator
New Fuel filter
New Mass air flow sensor
New intake manifold gasket
New idle air control valve -(programmed)
New plugs & wires
Checked catalytic converter
Checked distributer
Cleaned throttle body
Cleaned injectors
replaced computer ECU
what can be causing it to do this?
#2
Join Date: May 2008
Location: Great Mills, MD
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Marco, from what you are describing, it sounds like you have 2 plug wires that are crossed and you are having a cylinder or two fire at the wrong times, leading to the backfiring through the intake. From there, it is possible that you have managed to get the timing off a little. The timing chain may have jumped a tooth and that is causing your problems.
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Marco W. Kurek (06-19-2013)
#4
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Marco W. Kurek (06-26-2013)
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