Thread: Roush 427R engine issue. Troubleshooting..
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Old 02-20-2010, 01:35 PM
vryfst2 vryfst2 is offline
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Join Date: Feb 2010
Location: Paris, IL
Cobra Make, Engine: Superformance #2675
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Had the identical problem with my Roush 402R from the day I took delivery. Problem was the locking gas cap was not venting properly. So, I replaced the cap and the same problem. Therefore, I discarded the gas cap and now running with the racing cap (push down and it locks) only and END OF PROBLEM. THE CAR NOW RUNS LIKE A MONSTER. One downside: don't get in a wreck in which you are upside down as the gas will run out all over the ground.

p.s. My 402R cranked out 554 hp on the dyno.
Last edited by vryfst2; 02-20-2010 at 01:40 PM.. Reason: typo
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