fuel presure question
08-31-2010, 12:12 PM
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Car: 92 firebird gta
Engine: L98 with minor mods.
Transmission: 700r4
Axle/Gears: 3.23
fuel presure question
I have a 92 gta 5.7 L98. I wanted to check the fuel presure, but I don't know what the presure reading should be? What is the best setting for this TPI motor? Also do I have to unhook the vac. line while setting it. I know I will have to get a adjustable fpr. to change it. I just want to know the presure setting and if you need to unhook the vac line from the fpr.
09-01-2010, 09:36 PM
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Car: 1987 Trans Am
Engine: 355ci L98 soon to be turbo'd
Transmission: 700R4
Axle/Gears: 2.73 posi
Re: fuel presure question
Check the fp with the engine at idle and vacuum unplugged (cap off the vacuum on the plenum). It should be 42 (I believe, do a search to confirm).
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