01-01-2012, 07:49 PM
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#2 |
 Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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MAP sensor, FPR or (if he's running one) fuel pump resistor. MAP sensor is the first thing I'd check and then I'd reset and reupload the tune he's using from a backup to make sure nothing's just screwy in the MS' memory. All you need to test the MAP sensor is a multimeter and a reasonably accurate vacuum pump.
If the tubes you're referring to are the exhaust manifold runners, well, the temp drop could be accounted for by the excess fuel preventing a full burn (if it's not completely blowing out the spark as it is). Sticking valves aren't terribly common on these engines.... but they're not too hard to check for so feel free, I doubt that's the issue though.
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