Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[LC0112G]

Finally found the thread where I changed the engine.

http://www.omegaowners.com/forum/index.php?topic=122287.msg1570572#msg1570572

It appears that I did swap the original crank sensor from the old (wrecked) engine into the new/replacement one. However, it probably wouldn't of mattered because both the old and replacement engine are past the break point for the change in crank sensor, which according to EPC is VX90492002 up to engine no 08149313, and VX90540743 from engine number 08149313.

So I need VX90540743, which hopefully Shackeng is sorting for me.

[jb]

I have some of these new genuine GM if you need one

[Shackeng]

Malc, you have another PM

[LC0112G]

Malc, you have another PM

Have replied, unboxed is fine. Don't do social media though, so the WhatsFaceTweet thingy isn't gonna work.

[LC0112G]

Ok, sitrep....

I tried disconnecting the MAF, but when started it ran very very rough. I plugged it back in and from cold it started Ok. Unplugged it and very rough again. Decided I couldn't risk a test drive like that because I don't know what will happen if the ECU decides that both the Crank and MAF sensor are kaput.

The new sensor arrived sometime Friday (thanks Shack) so Saturday morning I fitted it. Not as easy a job as it should be, but there are worse ones. Drove it home (14 miles) and with trepidation approached the last roundabout...and...it was Ok. Haven't done many miles in it so far, but I did go to the chip shop again this evening, and then ran my Dad home 2 hours later and it hasn't stalled yet.

Idle isn't brilliant, but Ok. I'm reluctant to declare it 'cured' given the lack of driving so far, but it's looking promising.

[B52]

FWIW, I'm about 150 miles post crank-sensor replacement and still haven't relaxed.

[Doctor Gollum]

Being a cable throttled car, the ICV may well benefit from a good clean

[cam.in.head]

and also the throttle body/ butterflies. also making sure the stop screw hasnt been played with or worked loose causing a fully closed butterfly. if you squeeze the air pipe to the icv the idle speed should drop very low but not stall.

[Nick W]

Being a cable throttled car, the ICV may well benefit from a good clean

I've done that to dozens of cars, and some of the valves were really filthy.
It never made a difference to how the car ran.

[STEMO]

Being a cable throttled car, the ICV may well benefit from a good clean

I've done that to dozens of cars, and some of the valves were really filthy.
It never made a difference to how the car ran.

Well stop doing it then.

[Nick W]

Being a cable throttled car, the ICV may well benefit from a good clean

I've done that to dozens of cars, and some of the valves were really filthy.
It never made a difference to how the car ran.

Well stop doing it then.

I have

[Enceladus]

and also the throttle body/ butterflies. also making sure the stop screw hasnt been played with or worked loose causing a fully closed butterfly. if you squeeze the air pipe to the icv the idle speed should drop very low but not stall.

The main butterflies are fully closed at idle on X25XE and X30XE. The idle air intake bypasses the throttle butterflies via the Idle Air Valve.
A build-up of carbon in the throttle body throats will cause air to leak past the butterflies at idle. For that reason the throats need to be clean so they seal properly.
Please don't interfere with the TPS (throttle position sensor), it can't be easily reset.

[LC0112G]

Being a cable throttled car, the ICV may well benefit from a good clean

First thing I did - as mentioned in post #1.

[LC0112G]

FWIW, I'm about 150 miles post crank-sensor replacement and still haven't relaxed.

Well, I need the dead B52 currently sat at EGVA, and it's about a 150 mile round trip :-)

[cam.in.head]

and also the throttle body/ butterflies. also making sure the stop screw hasnt been played with or worked loose causing a fully closed butterfly. if you squeeze the air pipe to the icv the idle speed should drop very low but not stall.

The main butterflies are fully closed at idle on X25XE and X30XE. The idle air intake bypasses the throttle butterflies via the Idle Air Valve.
A build-up of carbon in the throttle body throats will cause air to leak past the butterflies at idle. For that reason the throats need to be clean so they seal properly.
Please don't interfere with the TPS (throttle position sensor), it can't be easily reset.

fully closed ? dont mean to contradict your answer but are you sure ? i always thought butterflies had to be slightly open to prevent jamming and let a little air through. the icv does the rest
 but i could be wrong. at least thats how it is on earlier jetronic injection cars