whats the most commen reason for this, any one?

[custom e30]

i turbo charged a stock m20b25 engine, i have it set at 5 pounds of boost, i only have 19lb injectors, here is my issue

when i shift from 1 gear to another the whole thing cuts out for a short second? any ideas? im thinking i need more fuel but i just if there where anyideas???

and here are some pics of the set up

[Farbin Kaiber]

Rrfpr?

[custom e30]

whats that mean???????????

[scottinAZ]

rising rate fuel pressure regulator. ties fuel pressure to manifold pressure

[custom e30]

ok got it, thanks, so im guessing everyone thinks its deff fuel related, lol

[Farbin Kaiber]

Well, I can see this is a budget build, so the first thing I assumed you didn't do, or I didn't see in the pictures you posted, I just blurted it out, so maybe my guess means nothing.

[custom e30]

k

[jlevie]

That sounds like it could be a blow off valve problem.

[custom e30]

explain how it would be a blow off valve prob?

[MR 325]

If you need a set of 24lb injectors, I have some for sale. I just took them off of my turbo E30.

[jlevie]

explain how it would be a blow off valve prob?

When you execute a shift the engine has to drop from high rpm to a lower rpm. The turbo will be spooled up from high rpm running and will be delivering more air than the engine can use when it drops to lower rpm. The blow off valve should should relieve that excess pressure. If it doesn't, the engine will momentarily be running too lean.

[custom e30]

ok got yea, and how much for injectors? and where u located?

[jrdeamicis]

No tune?

[custom e30]

no

[matt0300]

5 pounds off boost shouldn't be a bov problem, really? It could be a fuel problem, take out a spark plug and see if ur running lean.