Author Topic: 1.8 20v with seriously strange timing issue!!!  (Read 2837 times)

Offline Mikey301

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1.8 20v with seriously strange timing issue!!!
« on: 30 March 2016, 22:56 »
Hi guys (and girls of course!) this is my first post so i hope i have done this right im new to forums!! So i have been over the past couple of years been building my mk2 golf with a 1.8 20v turbo nothing unusual there. A few bits i have done that arent what everyone does but its a fairly regular setup, forge intake, k03s, 2.5" straight through exhaust, 2.5" boost plumbing and intercooler, saab red top injectors (the smaller of the two) standard management. Now comes the big problem that i am pulling my hair out with!! When i took it for its custom re map we encountered a problem that none of us had ever seen the trigger wheel for the crank sensor appears to be about 20 degrees out!! So as standard it would only make 120bhp and when mapped it had to be done 20 degrees out so that when i rectified the fault it would be up to full power as a result its barely driveable because as it hits about 3k if your not flat out the ecu tries to shut down due to the crank angle! So i brought another engine to chuck in and job done only problem is when i timed both engines up the trigger wheel and sensor are exactly the same?!!?! I have tried swapping cams knock sensors crank and cam sensors and no joy am i missing something? Is there anyone local with the same conversion that can spare some time to try my ecu and allow me to plug in and get some readings im surrey based but im willing to travel?!

Offline gazareth

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Re: 1.8 20v with seriously strange timing issue!!!
« Reply #1 on: 02 April 2016, 14:30 »
if the crank trigger being 20 degrees out is really the problem then why not take the wheel of the other engine you took out and have it re-drilled to correct the issue. then refit other engine.

Offline Mikey301

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Re: 1.8 20v with seriously strange timing issue!!!
« Reply #2 on: 04 April 2016, 21:56 »
Well that was my thought but in both engines they are drilled in exactly the same position and the cranks are drilled the same too i can trick it by turning it 20degrees but my engineering brain wants to know why it needs to be?!

Offline lemski

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Re: 1.8 20v with seriously strange timing issue!!!
« Reply #3 on: 04 April 2016, 22:06 »
Ecu fault ide have thought. Just off the top of my head. Cant see how it can be 20 out any other way

Offline gazareth

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Re: 1.8 20v with seriously strange timing issue!!!
« Reply #4 on: 05 April 2016, 01:44 »
could it be a knock sensor issue? have you got 1 fitted and wired up?

Offline Mikey301

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Re: 1.8 20v with seriously strange timing issue!!!
« Reply #5 on: 10 April 2016, 00:11 »
Thanks for the input guys we tried the original ecu on the rollers and it was the same. I have since then changed the knock sensors (correctly torqued!)

Offline lemski

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Re: 1.8 20v with seriously strange timing issue!!!
« Reply #6 on: 10 April 2016, 09:03 »
So its had a different ecu tried on the car?