I have a 1991 F150 XLT with automatic transmission and 5.0 engine. I recently had a no start condition and thought the timing had jumped. I replaced the timing chain and sprockets (timing did not jump).

I replaced the ICM on the side ove the distributor and now the truck starts and seems to have plenty of power. I disconnected the spout and set the timing to 10 before TDC. When I reconnect the spout it only advances about 2 degrees. Before the no start I retimed and when I reconnected the spout it would advance around 19 degrees.

When I drive the truck under load there is a rattleing nois (like a paint can). I am not sure if this is because the timing is not advancing. I also have white smoke from the exhaust but am not losing coolant and do not have coolant in my oil.

I ran KOER test and have code 44 and code 13. Is this a vaccume problem?

Please help.

Sorry for the long post.

Thanks.

 

If you are getting a rattling noise, that's spark knock which means it's too far advanced or running excessively lean.

Code 44 is a problem with the Thermactor system (air injection - smog pump). Code 13 is an idle issue.