Trouble Shooting

Improper combustion and/or faulty emission levels may be caused by any or all of the following:

• EGR system components inoperative or malfunctioning.
• EGR exhaust ports restricted or blocked.
• EGR vacuum hoses disconnected, crimped or improperly routed.
• Leaks in exhaust system decreasing backpressure causing EGR bleed valve not to close.