Author Topic: 2004 2.0 JTS 156 - Motor Control System Failure - Fixed!!!  (Read 35817 times)

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POC

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Re: 2004 2.0 JTS 156 - Motor Control System Failure - Fixed!!!
« Reply #30 on: September 04, 2015, 10:35:07 PM »
Thanks Craig - might do some shopping.

Col, my Toyota has not had a problem with the coil packs - have thrown a big end but no coil pack problems!

Paul
83 Alfasud Ti QV
69 105 GTV 1750 S1
05 Lotus 117 Exige SC
06 Alfa 156 Sportswagon
55 Lotus Mk6 Climax
96 Lotus Esprit S4s
77 Porsche 911 Carrera 3.0

Ex:
69 Fiat 850 Sports
74 Holden LH Torana
92 Lotus Esprit Turbo S

bonno

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Re: 2004 2.0 JTS 156 - Motor Control System Failure - Fixed!!!
« Reply #31 on: November 05, 2018, 01:14:00 PM »
Found this post via the search function, which relates to diagnosing a faulty coil pack on the Alfa 156 JTS engine. My 2005 156 JTS has been experiencing symptoms applicable to a faulty coil pack (Engine misfire/hesitation under load and low rpm, with EMS light coming on momentarily).
The difficulty with such a diagnosis is identifying which cylinder is causing the problem and is it the coil pack or spark plug. Please note that the simple balance test of each cylinder as shown on several Youtube clips will not pinpoint the cylinder misfire because you are unable to replicate faulty condition. For such a situation, the cheaper diagnostic tool that has I/M readiness status when  switched to ON will be able to identify the cylinder at fault when symptom is replicated. As in my case P0303 identified cylinder 3 to be at fault. Now to determine whether the spark plug or coil pack was at fault and save myself some money, swap the coil pack to say cylinder number 4. If the coil pack is at fault the code will now be P0304 or if it is still P0303 then spark plug is at fault. As in my case, the coil pack was faulty and new one purchased through e-bay (refer to link below). The car has been driven for several days without any further problem.
https://www.ebay.com.au/itm/NEW-GENUINE-BOSCH-IGNITION-COIL-ALFA-ROMEO-156-GTV-SPIDER-JTS-937A1-0221604103/301940621302?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Cheers
bonno
now
83 Alfetta GTV
05 156 JTS manual
past
00 156 selespeed
72 1750 GTV

CitroŽnbender

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Re: 2004 2.0 JTS 156 - Motor Control System Failure - Fixed!!!
« Reply #32 on: November 09, 2018, 02:14:20 PM »
Hi Bonno, Iím watching this to see if your ďpairedĒ coil pack (#2) goes soon after your replacement of #3.

bonno

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Re: 2004 2.0 JTS 156 - Motor Control System Failure - Fixed!!!
« Reply #33 on: November 09, 2018, 03:50:25 PM »
Hi CB
The car has been running fine since the coil pack was replaced and I guess that it is only a matter of time that the others will start showing signs of failure (itís just a matter of when). I could have gone out and replaced all 4 at a cost of $500, but I see no sense in wasting money as it is quite a simple job to diagnose, identify and replace. A two day turn around on supply of new coil pack is not a worry and I do have a spare in the boot just in case a COMPLETE coil pack failure is experienced which I consider unlikely (low RISK).
cheers
bonno
now
83 Alfetta GTV
05 156 JTS manual
past
00 156 selespeed
72 1750 GTV