I have a 1999 Pontiac Montana with a 3.4ltr engine. After 40,000 miles I began have fuel injector malfunctions. On August 4, 2004, after several injector cleanings, I decide to have all the injectors replaced with oem GM injectors. Unfortunately this did not cure the problem since I have later discovered, the oem injectors for GM's 3.4ltr engines have an inherant defect - the magnet that is used to open and close the injector is very weak. When ever the injector encounters small dirt particles the injector remains shut, therefore causing the cylinder to misfire. Since August of 2004, I have had my van in the shop seven times to have the injectors cleaned. I have an appointment to have my injectors cleaned again next week. I have notified General Motors Pontiac customer service department, spoke to 4 represenatives and they claim since the van is out of warranty they can not assist me in resolving this problem. I might add, that their attitude is very cavalier and matter-of-fact. The safety issue: The malfunctioning of the injectors creates a sever loss of acceleration power. On two recent occassions, my wife was attempting to cross a 45mph hwy and was nearly hit broadside by an oncoming auto. The van lost power halfway into the intersection. This problem is intermittent so you are unware of when it will occur. I spoke to two mechanics who say the injector issue is chronic on the 3.4ltr GM engines. They do not see this same problem with other makes of vehicles. Please help me to get GM's attention before I have to attend my wfe or 16 year daughters funeral or my wife and children loose their father in an automobile accident. Thank you for your attention to this matter.

- Loves Park, IL, USA

While driving engine check light will come on, and transmission roughly will shift gear. Vehicle at dealer, they will flush fuel injectors.

- Jerome, MI, USA