renix stroker troubles

[mousechez]

i built a stroker on renix - with adjustable fpr and map - 24lb injectors - idle is good - wot is great - wont level off above 1800 rpm - need help

[SilverXJ]

What do you mean by "won't level off"?

[mousechez]

it bucks and backfires

[SilverXJ]

Have you checked your TPS alignment?

[cruiser54]

When you put the engine in, did you get all the small ground wires reinstalled at a clean and shiny spot at the engine dipstick tube stud?

[mousechez]

new tps - and adjustment - grounds all good

[mousechez]

tps .8 volts at closed and graduates to 4.8 at wot - map adjusted to around 6.5 volts input

[cruiser54]

MAP voltage input is rather high considering stock is about 4.8. Try 5.1 or so.
What fuel pressure are you running with and without the vac line on the fuel pressure regulator?

[mousechez]

i dont have a pressure gage - just reset map to 5.4 whithout change - ill pick up a gage tomorrow

[Cheromaniac]

it bucks and backfires

Could be a bad fuel pump, clogged fuel filter, or kinked fuel line.

[mousechez]

ok got 43lbs at fuel rail with vacuum and 49 without

[cruiser54]

That's quite high. Should be 31 with and 39 without.

[SilverXJ]

Yes, that pressure is too high.

[cruiser54]

Between the high fuel pressure and high MAP supply voltage, it's gotts be real rich.

[mousechez]

well i set map and fpr back to stock and condition worsened