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Fuel pressure issue

mbagge01
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mbagge01 Member

mbagge01

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So, I am finally getting closer to my issue of my 04 cayenne turbo pulling timing at WOT with my evom tune. I ran some logs and had evom look at them and they noticed that my injection timing is way too high and is going up into 25-30ms. They said that it should not exceed 16ms and they feel that my injector timing is going up so high because my injectors are working at 100% to make up for a low fuel pressure at WOT. My question to everyone would be how would you recommend checking this problem. I have changed my fuel filter but my pumps and injectors are stock at 61,000 miles. I have not had issues at idle or mild to moderate driving and no CEL codes. I would assume that the issue would have to be the fuel pumps then but I am surprised that with both fuel pumps going at WOT, pressure should not be an issue. If it is, how do you test the fuel pumps at full capacity to check pressure. Thanks.

Martin

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