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MK3 / A70 markets
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Troubleshooting assistant

Pick a problem area, choose the symptom, then follow the remedy links or step-by-step TSRM procedure.

Diagnostic codes
Searching in 1990 USDM TSRM.
Areas /Poor fuel economy
Ignition System

Poor fuel economy

Ignition-system causes for poor fuel economy.

Possible causes and remedies
Possible cause
Spark plugs faulty
Remedy
Inspect plugs
IG-7
Possible cause
Incorrect ignition timing
Remedy
Reset timing
IG-20
A70 knowledge graph
Automatically linked from codes, vehicle context and archive references.
Search related
TSRM / TEWD
IG-20 — Ignition System - IG-20
1990 USDM TSRM · IG Ignition System · 1990 · North America
TSRM page referenced by this troubleshooting path
Troubleshooting assistant
Poor fuel economy
EM · Engine Mechanical
Same vehicle / manual context
TSRM / TEWD
A-14 — Service Specifications - A-14
1990 USDM TSRM · A Service Specifications · 1990 · North America
Same vehicle / manual context
Troubleshooting assistant
Engine hesitates / poor acceleration
IG · Ignition System
Same vehicle / manual context
ECU pinouts
1986 1G-GEU ECU pinout
1G-GEU · 1986 1G-GEU ECU
Related archive content
ECU pinouts
1986 1G-GTEU ECU pinout
1G-GTEU · 1986 1G-GTEU ECU
Related archive content
Articles
1986 worldwide debut
Related archive content
Forum discussions
How to use the Troubleshooting Assistant
Start here · How to navigate the website
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