Carbon buildup on the top of the piston is common. Over time this can lead to symptoms varying from light ticking to knocking noises. Performing a fuel injector cleaning procedure can often help the condition by removing some of the piston top deposits.
Resources for the Repair and Maintenance of your 1990 Dodge Shadow
1990 Dodge Shadow
1990 Dodge Shadow Problems
4 Cylinder engines, with a hard starting condition when cold and illumination of the Check Engine Light may have corrosion build up on the engine coolant temperature sensor. Our technicians tell us that the coolant sensor and pigtail should be replaced to correct this issue.
Vehicles equipped with a 4 cylinder engine may develop a no start or stalling condition, most commonly caused by a failed distributor pickup plate.
The fuel pump may fail resulting in a no start condition. Our technicians recommend replacing the fuel filter whenever the fuel pump is replaced. Failure to replace the fuel filter may cause the replacement pump to fail prematurely.
Erratic operation of the speedometer may be noted on vehicles equipped with a passenger side motorized seat belt. This is generally caused by a failed Passive Belt Control Module (PBCM). Our technicians tell us that if the speedometer functions correctly with the PBCM disconnected the PBCM should be replaced.
1990 Dodge Shadow Questions and Answers
1990 Dodge Shadow Reviews
i just got this 1990 dodge shadow bout a month ago and there is a loud squeaking noise that emits from the engine compartment. My uncle which is also a mechanic says that the problem may be the fly wheel is going out on it and also the belt is worn out. it could be to tight or to loose. that may be one of the many problems that is causing the car to emit such a high screeching sound. and i also put a whole tank of gas for like $30 bucks and it barely even lasts me 3 days and that's driving at normal speed on highways and also into towns. i may have to sell this car pretty soon. because the code reader on the car is sayin it has all kinds of problems with it..... it sucks
the car gets great fuel milage, 30+. but besides that nothing to brag about, chrysler rarely ever made a great vehicle