Hood Vents

[Shade133]

ah i see. sorry someone explained to me wrong what they were for then. so i should have no worries of this "vapor lock"? if so. sweet one less thing to never wory about

[sblake01]

I guess you could actually have vapor lock type symptoms on an EFI car if you had a low fuel pressure problem but as long as the pressure up in the acceptable range you'd never have to worry about it.

[shedkept]

Anyone familiar with this setup? It's old as the hills. Like a Trans Am, only more "Agrarian".

Back of the hood with acorn nuts on the bottom of the screws and 7 holes in the hood.

[sblake01]

Nothing I've ever seen. Looks like a previous owner's 'custom' modification.

[jmortensen]

Looks like a crappy attempt at a cowl induction hood.

[cygnusx1]

Fuel injected cars can vapor lock. Usually when parked though. It could be a sign of pressure loss problems though.

I bought a set of used inspection lids for cheap, and did a sawzall and mosquito net mod. I work on a teeny budget.

I did not want to cut into my hood but it would have been more effective. These inspection lid vents definitely work though.

Edited June 7, 2011 by cygnusx1

[sblake01]

Well, you can call that vapor lock if you wish but it really isn't. Different problem than vapor lock when it occurs on an EFI car and it has a different troubleshooting algorhythm.....

[cygnusx1]

Fuel turns to vapor, usually in the injectors, especially in a turbo car when parked. The car will then run lean when started up in this state because the fuel vapor, inhibits the flow of fuel through the pintle. Modern side-feed injectors are designed to better handle this, as the fuel flow in the "rail" surrounds the injector body to help pull away heat. In our old Z's the injectors are "dead headed" so that the only way to cool them enough condense the fuel, is to drive it while it flushes. The 280ZX's have the snorkel that sucks air from the road, and blows it at the injector bodies.

Side feed injectors are immersed in the fuel rail flow, to aid in cooling them.

Z injectors are not externally fuel cooled. Their bodies are stuck, to suffer in the heat of the engine bay.

Edited June 8, 2011 by cygnusx1

[shedkept]

Anyone familiar with this setup? It's old as the hills. Like a Trans Am, only more "Agrarian".

Back of the hood with acorn nuts on the bottom of the screws and 7 holes in the hood.

[sblake01]

There must be an echo in here with about a 4 hour delay.......

[Z train]

Well, you can call that vapor lock if you wish but it really isn't. Different problem than vapor lock when it occurs on an EFI car and it has a different troubleshooting algorhythm.....

Read this again.

[cygnusx1]

So if you work your way to the end of the trouble shooting algorhythms, what do they call it then?