1-6-5-4-3-2
The firing order for the 1988 Pontiac Lemans is 1-3-4-2. I hope this information to be useful to you
The firing order of my '87 Pontiac Sunbird is 1 3 4 2.
I have to jump start my Pontiac Bonneville 1988 everyday I drive it why is that.
Code 43 is listed as Electronic Spark Control Circuit
the same as the firing order set all your intake valves then go thur again and set your exh. valves.
The 1988 Pontiac Bonneville originally used R12 freon, this freon is no longer available due to government regulation. Your A/C system must have it's A/C service ports replaced. Then the system filled with the correct amount of R134a freon.
the firing order will be 1342 or 1243
Oxygen sensors are located in the exhaust manifolds & in the exhaust pipes on most vehicles
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18436572
if your asking if that is the firing order yes it is
Firing Order