Question about 1990 Pontiac Grand Am
Firing order, 1990 Pontiac grand am , 2.5L engine 4 cyl.
Its 1342 or 1432 To guarantee correct firing order take plugs out and place your finger/thumb over the plug hole so you can feel the compression cycle.Have some one flick the key on and off slowly .As soon as No 1 has done its compression cycle the next cylinder to compress will be in the firing order.You only need to test 2 clinders to tell you which one of the two firing orders ive given you.good luck and let me know how it goes
Posted on Nov 26, 2008
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Posted on Jan 02, 2017
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