What Makes 2nd Gens Flood So Much?
06-06-2004, 09:12 PM
#11
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Location: Columbia IL/St. Louis MO
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Originally Posted by j9fd3s' date='Jun 6 2004, 09:46 PM
yes if the fuse is blown car will not start
06-07-2004, 01:09 AM
#13
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Join Date: Apr 2004
Posts: 45
My car came with slightly leaking injectors & a very nice workaround - two wires run up from the fuel pump to just behind the driver's seat with a nice spade connector on them. If my car floods, I pull the wires (cutting off power to the fuel pump), crank till it starts, and then while it's running on the existing fuel, plug them back in and away I go.
As for the other part of your question, "Why do these darn things flood so much?" - there are a few things that cause flooding (though I'm new to RX-7s, so you might not want to listen to me).
Leaking injectors are a big one. The tips get crap in them from age and fuel, and don't seal quite right. It doesn't make a difference running, but when the car sits for a while with 40PSI in the fuel lines, and all that fuel leaks out into the intake, it's not going to start terribly well.
The "short start" is another problem. For reasons fairly unknown, if the engine is shut off before getting out of the cold-start loop, it's going to flood. If you move the car from the driveway to the street, it's not going to start later. Good excuse to go on beer runs, IMO, but still annoying.
Solutions to these flooding problems: There exists a little "H" adapter with a small orifice that goes between the supply & return fuel lines. It constantly bleeds a bit of pressure - no problem with the engine running (with a normal engine), but it bleeds fuel off after shutdown quickly enough to prevent leaking injectors from causing a large problem.
The other solution is a switch in the fuel pump line. I'm probably going to do this soon, since having to dig around behind my seat to start my car on occasion is annoying. This can also be used to shut the car off - cut the fuel pump, the engine will stop in 3-5 seconds, with no significant fuel pressure remaining. Another advantage is that if the switch is hidden, nobody is going to be able to drive off with the car unless they figure it out. No fuel, no start. Personally I'm planning to put a switch in the center console next to the "Security" light - just a nice rocker switch or something. And then remember not to rest my hand on it while driving.
Hope that helps some.
-=Russ=-
As for the other part of your question, "Why do these darn things flood so much?" - there are a few things that cause flooding (though I'm new to RX-7s, so you might not want to listen to me).
Leaking injectors are a big one. The tips get crap in them from age and fuel, and don't seal quite right. It doesn't make a difference running, but when the car sits for a while with 40PSI in the fuel lines, and all that fuel leaks out into the intake, it's not going to start terribly well.
The "short start" is another problem. For reasons fairly unknown, if the engine is shut off before getting out of the cold-start loop, it's going to flood. If you move the car from the driveway to the street, it's not going to start later. Good excuse to go on beer runs, IMO, but still annoying.
Solutions to these flooding problems: There exists a little "H" adapter with a small orifice that goes between the supply & return fuel lines. It constantly bleeds a bit of pressure - no problem with the engine running (with a normal engine), but it bleeds fuel off after shutdown quickly enough to prevent leaking injectors from causing a large problem.
The other solution is a switch in the fuel pump line. I'm probably going to do this soon, since having to dig around behind my seat to start my car on occasion is annoying. This can also be used to shut the car off - cut the fuel pump, the engine will stop in 3-5 seconds, with no significant fuel pressure remaining. Another advantage is that if the switch is hidden, nobody is going to be able to drive off with the car unless they figure it out. No fuel, no start. Personally I'm planning to put a switch in the center console next to the "Security" light - just a nice rocker switch or something. And then remember not to rest my hand on it while driving.
Hope that helps some.
-=Russ=-
05-23-2005, 05:01 PM
#14
Junior Member
Join Date: May 2005
Posts: 4
[quote name='Syonyk' date='Jun 6 2004, 10:09 PM']My car came with slightly leaking injectors & a very nice workaround - two wires run up from the fuel pump to just behind the driver's seat with a nice spade connector on them. If my car floods, I pull the wires (cutting off power to the fuel pump), crank till it starts, and then while it's running on the existing fuel, plug them back in and away I go.
As for the other part of your question, "Why do these darn things flood so much?" - there are a few things that cause flooding (though I'm new to RX-7s, so you might not want to listen to me).
Leaking injectors are a big one. The tips get crap in them from age and fuel, and don't seal quite right. It doesn't make a difference running, but when the car sits for a while with 40PSI in the fuel lines, and all that fuel leaks out into the intake, it's not going to start terribly well.
The "short start" is another problem. For reasons fairly unknown, if the engine is shut off before getting out of the cold-start loop, it's going to flood. If you move the car from the driveway to the street, it's not going to start later. Good excuse to go on beer runs, IMO, but still annoying.
Solutions to these flooding problems: There exists a little "H" adapter with a small orifice that goes between the supply & return fuel lines. It constantly bleeds a bit of pressure - no problem with the engine running (with a normal engine), but it bleeds fuel off after shutdown quickly enough to prevent leaking injectors from causing a large problem.
The other solution is a switch in the fuel pump line. I'm probably going to do this soon, since having to dig around behind my seat to start my car on occasion is annoying. This can also be used to shut the car off - cut the fuel pump, the engine will stop in 3-5 seconds, with no significant fuel pressure remaining. Another advantage is that if the switch is hidden, nobody is going to be able to drive off with the car unless they figure it out. No fuel, no start. Personally I'm planning to put a switch in the center console next to the "Security" light - just a nice rocker switch or something. And then remember not to rest my hand on it while driving.
Hope that helps some.
-=Russ=-
[/quote]
As for the other part of your question, "Why do these darn things flood so much?" - there are a few things that cause flooding (though I'm new to RX-7s, so you might not want to listen to me).
Leaking injectors are a big one. The tips get crap in them from age and fuel, and don't seal quite right. It doesn't make a difference running, but when the car sits for a while with 40PSI in the fuel lines, and all that fuel leaks out into the intake, it's not going to start terribly well.
The "short start" is another problem. For reasons fairly unknown, if the engine is shut off before getting out of the cold-start loop, it's going to flood. If you move the car from the driveway to the street, it's not going to start later. Good excuse to go on beer runs, IMO, but still annoying.
Solutions to these flooding problems: There exists a little "H" adapter with a small orifice that goes between the supply & return fuel lines. It constantly bleeds a bit of pressure - no problem with the engine running (with a normal engine), but it bleeds fuel off after shutdown quickly enough to prevent leaking injectors from causing a large problem.
The other solution is a switch in the fuel pump line. I'm probably going to do this soon, since having to dig around behind my seat to start my car on occasion is annoying. This can also be used to shut the car off - cut the fuel pump, the engine will stop in 3-5 seconds, with no significant fuel pressure remaining. Another advantage is that if the switch is hidden, nobody is going to be able to drive off with the car unless they figure it out. No fuel, no start. Personally I'm planning to put a switch in the center console next to the "Security" light - just a nice rocker switch or something. And then remember not to rest my hand on it while driving.
Hope that helps some.
-=Russ=-
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05-23-2005, 05:05 PM
#15
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Join Date: May 2005
Posts: 4
[quote name='PORTED' date='May 23 2005, 02:01 PM']
[/quote]
Thanks, you have just answered my question bout the cracked injector tips in the primarys. I had my exhaust right off from the turbo "T70" and while I was winding the car over there was that much fuel getting dumped from this problem it was dripping-running out of exhaust turbine.
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Thanks, you have just answered my question bout the cracked injector tips in the primarys. I had my exhaust right off from the turbo "T70" and while I was winding the car over there was that much fuel getting dumped from this problem it was dripping-running out of exhaust turbine.
05-24-2005, 08:10 AM
#16
Member
Join Date: Jan 2003
Posts: 75
If you have leaky injectors and let your car sit for amounts of time, the length depending on how bad your leak is, it will flood on it's own, just unplug the pump and crank it like the other guy said that will work, to unflood it. But to get around the flooding problem, Mazdatrix.com makes and injections bleed off kit that will keep your car from flooding due to leaky injectors, i have one and my car hasn't flooded since, it's pretty cheap and easy to install, the only other alternative to fix it is new injectors that don't leak or send out your injectors to be fixed.
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