Could a stopped up precat be the prob?
#1
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Could a stopped up precat be the prob?
After 4.5K RPM my boost drops from 11 to 5 and never builds back up. Sometimes at WOT I can only get 5 psi. I took it to a shop and they replaced a few check valves and hoses, but were still unable to fix the prob completely. They suggested that a downpipe might be the answer. Thanks for the help in advance.
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Depending on what mods you already have on the car, I would put a downpipe on it anyways. The 5 pounds of boost after transition is typical of a clogged pre-cat but it could still be something else. Whether it fixes the problem or not, you're better off with a precat (unless you already have a cat-back and intake on it).
#4
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A clogged cat(pre or main) will also reduce boost before 4500 rpm. You have a control problem with
either the charge control solenoid or charge relief valve most likely. Could be caused by bad
valves for the pressure or vacuum tanks also.
either the charge control solenoid or charge relief valve most likely. Could be caused by bad
valves for the pressure or vacuum tanks also.
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I think I have the same problem. I think my precat is clogged since it glows orange , and my boost patterns are as follows:
10-5-10 but right away it drops down to 5 psi. Seems like it doesn't hold its boost. Opinions?
10-5-10 but right away it drops down to 5 psi. Seems like it doesn't hold its boost. Opinions?
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Originally posted by REDLINE
I think I have the same problem. I think my precat is clogged since it glows orange , and my boost patterns are as follows:
10-5-10 but right away it drops down to 5 psi. Seems like it doesn't hold its boost. Opinions?
I think I have the same problem. I think my precat is clogged since it glows orange , and my boost patterns are as follows:
10-5-10 but right away it drops down to 5 psi. Seems like it doesn't hold its boost. Opinions?
#7
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My precat glows after I go for a drive. Someone said it could be running really rich. I know one of my injectors has a slight leak to it. I don't know whether this contributes to it running rich.
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