# 4G63t Compression Numbers

**URL:** <https://forums.speedlife.net/t/4g63t-compression-numbers/199881>\
**Category:** PittSpeed Automotive\
**Created:** [September 29, 2008, 11:56pm UTC](https://forums.speedlife.net/t/4g63t-compression-numbers/199881 "2008-09-29T23:56:26Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![beat90tsi](https://avatars.discourse-cdn.com/v4/letter/b/43a26b/32.png) [@beat90tsi](https://forums.speedlife.net/u/beat90tsi)\
**Post date:** [September 30, 2008, 2:13am UTC](https://forums.speedlife.net/t/4g63t-compression-numbers/199881/2 "2008-09-30T02:13:12Z")

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> [@FS: 1993 Ranger V6 4x4 $1200](https://forums.speedlife.net/t/fs-1993-ranger-v6-4x4-1200/37703/24):
>
> I don’t know if ya’ll followed my GVR4 purchase thread [http://pittspeed.com/forums/showthread.php?t=45584&highlight=gvr4](http://pittspeed.com/forums/showthread.php?t=45584&highlight=gvr4) , but I have a '91 now. All stock, one owner, etc. However, it ran shitty (high idle, then low/miss idle, miss under load, etc). So we finally got around to working on it, and sure enough the cam timing was off (prev owner had just had a t-belt done).
> 
> After fixing the cam timing, we ran a compression test, 3 holes were at 160psi, one at 165. Seams good to me… thoughts?
> 
> -TJ

Check voltage, they can run quite shitty without having trouble starting if the alternator output is low.

Did you check for boost leaks?

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