Are there differences in stock 1st Gen injectors??

Are there differences in stock 1st Gen injectors??

03-16-2004, 02:34 AM

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Are there differences in stock 1st Gen injectors??

Are there any differences in the injectors used in the 1st Generation trucks and if so, what are they?

Yes, there are differences, not only in the injectors but in the head they fit into.
On the very early 1st Gen trucks 1989-1991.5 model year the injectors were a 9mm injector.
These injectors ran richer (flow more fuel) than the stock injectors used in the 1991.5-1993 model years.
The larger 9mm bodied injectors flowed more fuel and in the process the larger body of the injector made the cylinder head more prone to developing cracks due to the smaller amount of metal in and around the injector bore and the valve seats.
This problem/issue was addressed in the later 1991.5 and up trucks by going to a smaller 7mm body and this resulted in much less cracking potential.

Pastor Bob.

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Pastor Bob

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