2G Hot Startup Issues

[Blakedwight4]

My 2g has issues starting on hot starts. It stumbles over 90% of the time if it’s even not completely at operating temp., and if I start the car after going inside the grocery store (5-10 mins.) it stumbles on and the whole car shakes like crazy for 10 seconds then goes away. Really annoying issue been going on for a while now, and more concerned about it not being safe for the car rather than just being annoying. Any help is greatly appreciated.

 

[luv2rallye]

First check the fuel pressure solenoid: https://www.dsmtuners.com/threads/vapor-lock-hot-start.217349/#post-1821514

Other hot start issues: http://www.dsm.org/how-tos/JFM/HotStart.html

 

[Blakedwight4]

I have done all those listed and deleted fuel pressure solenoid.

 

[Blakedwight4]

I have done all those listed and deleted fuel pressure solenoid.

Still encountering this issue, the car shakes like crazy for 10 or so seconds and stumble starts, sometimes there is a faint metallic clanking sound, and help is appreciated

 

[dwb]

Do you have a wideband O2 sensor? That'll tell you if it's a lean or rich condition and at least give you a starting point.

 

[luv2rallye]

Why did you delete the fuel pressure solenoid? It is designed for just that, raise the fuel pressure for hot starts. At a certain temp it will activate and pull from the outside instead of from the intake manifold under vacuum. It is the same as removing the vac line from the FPR. It raises the fuel pressure to avoid "vapor lock" in hot conditions.

 

[Blakedwight4]

Why did you delete the fuel pressure solenoid? It is designed for just that, raise the fuel pressure for hot starts. At a certain temp it will activate and pull from the outside instead of from the intake manifold under vacuum. It is the same as removing the vac line from the FPR. It raises the fuel pressure to avoid "vapor lock" in hot conditions.

I deleted it bc I was having the same issue. I reinstalled but I have one from a Mazda protege 03 that someone on here suggested I use

 

[Blakedwight4]

Why did you delete the fuel pressure solenoid? It is designed for just that, raise the fuel pressure for hot starts. At a certain temp it will activate and pull from the outside instead of from the intake manifold under vacuum. It is the same as removing the vac line from the FPR. It raises the fuel pressure to avoid "vapor lock" in hot conditions.

I am still having this startup issue. I have installed an AFPR -6an lines, and a warlboro 255, and still no luck. I have tried setting base fuel pressure, but my fuel pressure gauge's needle keeps bouncing erratically? I don't believe it is supposed to do this being its a liquid filled gauge. Thoughts?

You must be logged in to view this image or video.

 

[Blakedwight4]

I am still having this startup issue. I have installed an AFPR -6an lines, and a warlboro 255, and still no luck. I have tried setting base fuel pressure, but my fuel pressure gauge's needle keeps bouncing erratically? I don't believe it is supposed to do this being its a liquid filled gauge. Thoughts?

You must be logged in to view this image or video.

You must be logged in to view this image or video.

 

[b00zt3d spyd3r]

Are you using ecmlink? Do you have hot start enrichment enabled? I was having this same issue until I enabled that

 

[Blakedwight4]

Are you using ecmlink? Do you have hot start enrichment enabled? I was having this same issue until I enabled that

I figure that would help, yes. But unfortunately I do not have dsm link yet