Pelican Parts Forums

Pelican Parts Forums (http://forums.pelicanparts.com/)
-   Porsche 911 Technical Forum (http://forums.pelicanparts.com/porsche-911-technical-forum/)
-   -   85 Carrera Twilight Zone Timing Problem (http://forums.pelicanparts.com/porsche-911-technical-forum/400494-85-carrera-twilight-zone-timing-problem.html)

10X5-9Torr 03-26-2008 05:04 PM

85 Carrera Twilight Zone Timing Problem
 
Completed total engine rebuild a couple of weeks ago stuffed it in the car fired it up. :) Noticed only 1,2,3 cylinders firing :confused:(ran pretty smooth). After checking everything from fuel injection to all DME I/O voltages and pulses (I'm an electronics tech since the 70's) and everything looked correct I decided to pull the dist. and see if it was 180 out, after switching it 180 and reinstalling and re-firing the engine I found cylinders 4,5,6 firing. Also, the side that is not firing the heat exchanger stays cool. Is it possible to have a cam 180 out and not put the valves through the pistons? I've rebuilt a lot of V8's and Volkswagen engines and never encountered anything like this. Any help, suggestions or free money would be greatly appreciated.

Steve B
85 Carrera Targa
06 GTI
83 Scirocco

2.7RACER 03-26-2008 05:26 PM

Steve B,
Classic symptoms of a cam timed 180 out.
You will find 1 and 4 are under compression at the same time rather than opposite.
Do an engine drop and retime right or left side cam, your choice.
You can access this with a partial drop if you wish to avoid a complete drop.
It is close and a bit tougher access.

10X5-9Torr 03-27-2008 03:40 AM

Doug, Thanks for the reply. I was pretty sure this was the problem, guess I know what I'm doing this weekend.

Steve B


All times are GMT -8. The time now is 07:09 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website


DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.