# 97 f150 **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** ford, f150\ **Created:** [February 26, 2012, 4:34am UTC](https://community.cartalk.com/t/97-f150/71153 "2012-02-26T04:34:32Z")\ **Posts on this page:** 3\ **Page:** 2
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [February 27, 2012, 10:36am UTC](https://community.cartalk.com/t/97-f150/71153/21 "2012-02-27T10:36:46Z")
The compression readings are way too low. The general rule of thumb is 20 X the compression ratio and in this case the ratio is 9.2. It will vary a little depending on altitude, barometric pressure, etc, etc. Even a high mileage engine that is in good shape should carry about 180 PSI. If the engine was actually rebuilt and that story is not a bald-faced lie then something has happened to it (overheated, etc), the engine was flogged into the pavement after the rebuild, or the rebuild was not done properly. Run a wet compression test on it; meaning give each cylinder a small squirt of motor oil before you test it. If the numbers jump from 140-150 up to 170ish or so then there’s a piston ring problem. ---
**Author:** ![Chalex](https://avatars.discourse-cdn.com/v4/letter/c/90db22/32.png) [@Chalex](https://community.cartalk.com/u/Chalex)\ **Post date:** [March 1, 2012, 8:57am UTC](https://community.cartalk.com/t/97-f150/71153/22 "2012-03-01T08:57:03Z")
I have found the bank 1 IMRC actuator rod was disconnected from the cam attached to the back of the intake manifold. I was able to install a new pin to keep it in place. I also was able to hook up a smoke machine to the vacuum lines & found & fixed some broken lines. still have to keep up the diagnosing as i still have to pass smog. thanks all for your help/advice. ---
**Author:** ![harleystratos](https://avatars.discourse-cdn.com/v4/letter/h/a698b9/32.png) [@harleystratos](https://community.cartalk.com/u/harleystratos)\ **Post date:** [March 1, 2012, 4:54pm UTC](https://community.cartalk.com/t/97-f150/71153/23 "2012-03-01T16:54:36Z")
keep up the info. Replace that oil pan. you got the COP’s?? replace them. check the boots… I also see this as a black hole with out an end… [Previous page](https://community.cartalk.com/t/97-f150/71153.md?page=1)