Pressure Regulator Control Solenoid Valve

Discuss topics related to the CA18DE and CA18DET series engines.
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sjbsuperman1425
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Joined: Tue Nov 06, 2007 2:24 pm
Car: 1989 Nissan 240sx
CA18DET
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I've read through the FSM and searched here, and on Zilvia.net, but could not find anything to my knowledge, I will keep looking. But what exactly is the "Pressure Regulator Control Solenoid Valve", and what is its purpose?

i first thought it to be something with regulating boost or regulating fuel but im not sure. Please any insight would be appreciated. and i will keep searching. Thanks Guys/Gals!


boost_boy
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Joined: Thu Nov 14, 2002 7:28 am
Car: B12 sentra w/built CA18DET, B12 sentra w/fully-built CA18DET, S13 coupe w/ CA18DET, S13 hatch w/CA18DET, 2002 maxima SE
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sjbsuperman1425 wrote:I've read through the FSM and searched here, and on Zilvia.net, but could not find anything to my knowledge, I will keep looking. But what exactly is the "Pressure Regulator Control Solenoid Valve", and what is its purpose?

i first thought it to be something with regulating boost or regulating fuel but im not sure. Please any insight would be appreciated. and i will keep searching. Thanks Guys/Gals!
You shouldn't have one and don't need one. If you do have one you're done and your project will not be fun. In short, don't worry about it and don't ask about it or you will become skeptical and confused (Take my word).

Dee

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sjbsuperman1425
Posts: 2889
Joined: Tue Nov 06, 2007 2:24 pm
Car: 1989 Nissan 240sx
CA18DET
Location: Bay City, MI
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so just leave it off? ok cuz it was worrying me and everything lol.

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JNM240
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Car: 90 Coupe, 90 Hatch (CA18DET)
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boost_boy wrote:You shouldn't have one and don't need one. If you do have one you're done and your project will not be fun. In short, don't worry about it and don't ask about it or you will become skeptical and confused (Take my word).

Dee
Ive been researching some on this subject to try and solve my cold start issue. From what ive read in the FSM, the PRSCV regulates the vacuum seen at the fuel pressure regulator at start up. When cold, the pluger in the PRSCV is open allowing the FPR to see atmospheric (no change in fuel pressure while cold). Once warm, the solenoid closes the plunger and the FPR now sees manifold vacuum/pressure. I have piddled a little with trying to get this to work, and while it does solve the cold start issue, it introduces a once-warmed up issue. So i took it back off, thinking i might need a vacuum check valve or something similar.

Now, if the PRSCV has nothing to do with my stumbling and hesitation only while cold, then what could be causing it? Once my car is fully warmed up, it drives 100% like a normal car (a normal car with a GT28R pushing 16 pounds of boost).


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