Cimarron V6-173 2.8L (1986)
Fuel: All Technical Service Bulletins
Fuel Injectors - Gasoline Recommendations
NO.: 87-I-2A
DATE:
Nov. '86
GROUP:
6C
SUBJECT:
GASOLINES MARKETED AND ADVERTISED TO KEEP PORT FUEL INJECTORS CLEAN
MODELS AFFECTED: ALL MODELS WITH PORT FUEL INJECTORS
This bulletin supersedes Dealer Service Information Bulletin 87-I-2, which should be destroyed.
Some owners of vehicles with multi-port injection systems may have experienced impaired driveability resulting from deposits forming on fuel injectors.
Symptoms include a rough idle and decreased acceleration. When the problem was first recognized, few gasolines contained detergent additives which
could prevent deposit build-up, and even fewer could remove deposits from injectors.
About a year ago, General Motors and other auto companies asked gasoline suppliers to provide gasolines containing sufficient concentrations of
appropriate detergents to prevent port-fuel injector deposits.
The response to auto industry requests has been very encouraging. It appears that all major brands are treated with detergent additives, and that many
independent brands are now or soon will be treated. This includes brands selling gasoline containing ethanol, for which the ethanol has been treated with
a detergent additive.
Because the number of brands treated with detergents is becoming so extensive, General Motors is no longer publishing a list of brands advertised to
contain the needed detergents. Instead, customers should be urged to purchase fuel from any gasoline marketer who states, at the point of purchase or
through media advertising, that the gasoline contains sufficient detergent additives to prevent port fuel injector deposits or remove them from fouled
injectors. Customers properly informed by claims of gasoline suppliers or marketers will be in a position to prevent the unnecessary fouling which may
result from use of a gasoline with ineffective or no detergent additives. While these claims are not based on data generated by General Motors, we have
no reason to doubt their truth.
