The dreaded engine light - 939 2.2 JTS

bazzbazz · December 06, 2018, 08:57:01 PM

When was the last time you put some injector cleaner through the tank?

ACE · December 06, 2018, 09:07:33 PM

About the same time that the plugs were replaced.
But when all's said and done that was probably only about 100km back down the road.

bazzbazz · December 06, 2018, 10:19:21 PM

Well P1175 is sometimes a fault with the Cam Timing Sensor, which would explain the occasional rough idling, hesitation & engine light occasionally flashing. The engine light flashing is the clue here, if it were a mixture or air leak problem the light would just come on.

Would also explain the misfires (P0300 & P0302 (ignition failure)

Disconnect the Cam Timing Sensor and see if it forces a P1175 error. Also try giving the Cam Timing Sensor a good clean as well as its plug & see if anything changes.

ACE · December 06, 2018, 10:31:42 PM

Will do. Thanks Bazz.

ACE · December 07, 2018, 07:25:31 PM

Today was the day for the crank angle sensor to get some attention, and just as well it did!

I have read about the difficulties some have with the blue locking tab and being able to release the connector ... This one however presented a different challenge! The locking tab and the catch, it seems had previously been broken off, so the connector had been "silasticked" back on!!!

So the sensor was removed, with cable attached, to enable it and the connector to be separated. Having cleaned it all, including the connector as another temporary measure, I'm on the hunt for a new connector! btw, while the CAS is Bosch, the connector is not! Otherwise it might have been easy. Other than that, the whole assembly looked in good nick.
With the CAS disconnected, the car won't start. The error generated is P0335 (RPM sensor).

All back together, it's still throwing P0300, P0302 & P1175s but it's running pretty well - despite it all!

Tomorrow, the cam timing sensor(s) might get some attention ...

Citroënbender · December 07, 2018, 07:43:14 PM

You can get "SuperSeal" type connectors at Autobarn, Jaycar etc, and the housing can be unpicked/replaced leaving the terminals uncut.

ACE · December 07, 2018, 08:42:02 PM

Thanks CB,
I spent some time endeavouring to modify a Toyota connector today. Initially it looked pretty close, but after extensive modification it still just isn't quite right.

I'll have a look at Autobarn and Jaycar, but I've found a local "connector specialist" who says he might have something for me on Monday ... Here's hoping.

bazzbazz · December 07, 2018, 10:35:34 PM

Quote from: ACE on December 07, 2018, 07:25:31 PM
Today was the day for the crank angle sensor to get some attention, and just as well it did!

I have read about the difficulties some have with the blue locking tab and being able to release the connector ... This one however presented a different challenge! The locking tab and the catch, it seems had previously been broken off, so the connector had been "silasticked" back on!!!

So the sensor was removed, with cable attached, to enable it and the connector to be separated. Having cleaned it all, including the connector as another temporary measure, I'm on the hunt for a new connector! btw, while the CAS is Bosch, the connector is not! Otherwise it might have been easy. Other than that, the whole assembly looked in good nick.
With the CAS disconnected, the car won't start. The error generated is P0335 (RPM sensor).

All back together, it's still throwing P0300, P0302 & P1175s but it's running pretty well - despite it all!

Tomorrow, the cam timing sensor(s) might get some attention ...

If you check I did say to do all that with the Camshaft Timing Sensor NOT the Crank Angle Sensor.

ACE · December 08, 2018, 12:32:26 PM

Disconnected the Cam Timing Sensor - inlet (CTSi):
Runs rough; Engine Management Light (EML) on permanently; P0365 - Timing Sensor (intake)

Removed CTSi, cleaned sensor & connector on cable (physical & electronics spray); replaced; reconnected;
Still runs rough at low RPM; EML flashing; P0300 & P0302 (my old friends!)

CTS exhaust (CTSe):
Removed, cleaned, replaced, but not reconnected;
Runs rough; EML on permanently; P0340 - Timing Sensor (exhaust)

Reconnected CTSe:
Rough, no EML, no codes (but only short duration with engine running)

SWAPPED sensors (same part number)
Runs rough; EML flashing occasionally; P0300 & P0302

NB: none of the above included driving the vehicle - just starting, running for a minute or two then switching off.

Injectors?

bazzbazz · December 08, 2018, 05:38:23 PM

Ahhhhh - cam timing sensor Inlet/Cam timing sensor outlet

? Huh?

You're not referring to the two cigar shaped items with plugs at the top that are in the top of the engine behind each cam pulley?

One with a grey plug, the other with a black one?

ACE · December 08, 2018, 06:08:21 PM

Nope!
The Cam Timing Sensors at the rear (cylinder #4 end) of the engine.
Not the Cam Variator Solenoids at the front end of the engine.
Been there done that!

bazzbazz · December 08, 2018, 07:34:01 PM

Ok, cool, just checking, sometimes people get the two mixed up.

You seem to have run down "the usual suspects", time to think laterally. Have you tried disconnecting the MAF and taking it for a drive? Just to see if there is a change whether it is better or worse.

The reason I ask this is that after cleaning the Cam Sensors you reported -
"Reconnected CTSe: Rough, no EML, no codes (but only short duration with engine running)"

You may be suffering for more than one item having an issue. Just a thought.

Other than that it could very well be injectors. You said you had added injector cleaner, it may be worth while that after cleaning the cam sensors and clearing the taking it for an "Italian Tune up".

Sorry I can't e of more help . . . . my "Swami Senses" don't work as well at this range.

ACE · December 08, 2018, 08:03:47 PM

Sportiva,
are you possibly referring to a 2l JTS or twin spark?

This problematic machina is the 2.2 litre GM based JTS.

ACE · December 08, 2018, 08:13:07 PM

and back to Bazz,

I have not tried disconnecting the MAF - maybe tomorrow?
I took it for a "tune up" run this arvo - about 50 km. It's pretty warm here today too!
Apart from a brief glimmer from the EML, it was all good!
UNTIL I had to duck into the shops ...
On restarting it was EML FULL ON!

"OK, so let's see what MES sez"
BUT the PC had overheated in the boot! Just can't tke a trick!
Still waiting to see what it was ...

ACE · December 09, 2018, 07:34:25 PM

The PC has recovered and reports that yesterday's excursion resulted in
P1175, P0300 & P0302
Nothing new there, but I suspect it might have been the P1175 that caused the EML to stay on.

Today I disconnected the Air Flow Meter (AFM) - there does not appear to be a "MAF" but I suspect that they are synonymous?

Anyway on restarting: very rough at idle and a smell of raw fuel!!! ?
Lots of warnings on the dash - ASR, VDC, hill holder, and you guessed it "Check engine" with EML on permanently! Switched off and checked codes:
P0100 - Air Flow Meter
P0564 - Cruise activation control
But no others!

Took it for a short drive (with AFM still disconnected) ...
EML on immediately and lots of warnings flashed on the dash. Including the "low fuel" light and a zero reading on the fuel gauge! (Tank was at least half full!)
Errors: P0110 (AFM), P0564 (Cruise), P0110 (Air temp) but no P0300, P0302 or P1175!

Reconnected the AFM.
Restarted and fuel gauge reports that fuel does in fact exist!
EML only seems to report occasionally now, a couple of flashes when at low revs (idle or getting underway) - hesitation or stumbling. But when moving it's happy to accelerate hard or run at high revs with out complaint!
I (want to) think it's getting better ...
Maybe the injector cleaner (it got another dose yesterday) is having an effect?

Time to take it for a decent run ...