Ignition Coil Resistance - Manual Correction
88isuzu08BULLETIN NUMBER SB88-04-007
ISSUE DATE December, 1988
GROUP ELECTRICAL
I-MARK (JT) IGNITION COIL RESISTANCE (WORKSHOP MANUAL CORRECTION)
VEHICLES AFFECTED
1987-1988 I-Mark (JT) models with nonturbocharged engine.
SERVICE INFORMATION
The specifications for primary and secondary ignition coil resistance are incorrectly printed in the following Workshop Manuals. The pickup coil resistance is also incorrectly specified, in the 1988/89 I-Mark Workshop Manual only.
NOTE
Take measurements only at coil terminals, not at harness ends.
Manual Page No.
1988/89 I-Mark (JT) 04A-37;
(Publication No. AIMI-SVC-168, 03A-60
part No. 2-90989-002-0)
1988 I-Mark (JT) 04A-30
(Publication No. AIMI-SVC-160, part No. 2-90988-002-0)
1987 I-Mark (JT) 04A-30
(Publication No. AIMI-SVC-152, part No. 2-90999-107-8)
1987 I-Mark (JT) 04A-30
(Publication No. AIMI-SVC-145, part No. 2-90999-107-7)
SERVICE PROCEDURE
Make the following pen-and-ink changes on the appropriate page of the referenced Workshop Manuals:
MAIN DATA AND SPECIFICATIONS
Distributor
Ignition method Full transistor with ignitor
Direction of rotation Counter clockwise
(as viewed from the cap side)
Dwell angles 40 - 50~ at 1,500 rpm
Advancer Centrifugal advance unit with
vacuum advancer
Air gap mm(in.) 0.2 - 0.4 (0.008 - 0.016)
Ignition coil
Primary voltage (V) 12V
Primary coil resistance (ohms) 1.1 - 1.8
Secondary coil resistance (K ohms) 11.2 - 20.5
Insulation resistance (M ohms) More than 10
Spark plug
Type BPR6ES11, W2OEXR-U11
Spark gap mm(in.) 1.10 (0.043)
1988/89 I-MARK ONLY:
03A-60 EMISSION CONTROLS (NON-TURBO)
CUTS OUT
Definition:
Pulsation or jerking that follows engine speed, usually more pronounced as engine load increases. The exhaust may have a steady spitting sound at idle or low speed. May only happen with TCC applied, but this does not indicate a TCC problem.
^ Perform "Diagnostic Circuit Check".
^ Perform "System Performance Check".
^ Visual Check:
- Vacuum hoses for splits, kinks and proper connections, as shown on vacuum hose routing diagram label.
- Ignition wires for cracking, hardness and proper connections at both distributor cap and spark plugs.
- Wiring for proper connections, pinches and cuts.
^ Check for misfiring at spark plugs:
1. Disconnect and plug air cleaner and EGR vacuum hoses.
2. Check spark at all plug wires with ST125
- No spark at one or more cylinders:
^ Check spark plug wires by connecting ohmmeter to ends of each wire in question. If meter reads over 30,000 OHMS, replace wire(s). If wires check OK, or
- Spark at all cylinders Visually check distributor cap inside and out for moisture, dust cracks, burns and check for arcing to coil mounting screws. With engine running, spray cap and plug wires with fine water mist to check for shorts.
^ Check for poor ground on integral ignition coil. Remove spark plugs and check for cracks, wear, improper gap, burned electrodes and heavy deposits.
^ Check pickup coil in distributor with ohmmeter, and check for proper connections at module. Pickup coil should be 140 - 180 OHMS and not grounded.
- If pickup coil checks OK, ^ Remove rocker covers, check for bent pushrods, worn rocker arms, broken valve springs, or worn camshaft lobes. Repair as necessary.
^ Check for exhaust system restriction.