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Originally Posted by lodownlv
the egr valve wouldnt do it and if it was sticking it would throw the SES lite. whoever has this problem start with the fuel injection system bad injector or fuel pressure regulator would cause loop at high rpms and rough idle. i can assure you that its not the egr
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OK, if you read back in the post, you'll see that I have a throttle body fuel injection system, not individual injectors ~ so a 'bad injector' can be ruled out. However, the Fuel Pressure Regulator makes sense. Where is it located? How can I test it?
With the number of miles, changing the EGR might make sense, too. But fuel delivery has always been my concern. Where is the F.P. Regulator? Is it available aftermarket?