LEMON Manuals
: Even more car manuals for everyone
Home
>>
GMC
>>
1987
>>
Value Van P3500, 7.4 W, Standard
>>
Repair and Diagnosis
>>
Engine Performance
>>
System
>>
CCC Tests W/O Codes
>>
Backfire
>>
Symptom Definition
Symptom Definition
Fuel ignites in intake manifold, or exhaust manifold, making a loud popping noise.