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Old 10-18-12, 08:26 PM   #1
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Exclamation New Problem... Think it might be the fuel pump? 82 rx7

Alright so i had a starter problem- FIXED, then a fuse problem- FIXED, now i cant get the engine to start up and stay on. I think it might not be getting fuel, i changed the fuel filter and put some premium gas in. when i used some ignition fluid i got it too start up for like 2-3 seconds but then it died. Anyone know what this could be? or a way to find out what could be wrong?
Thanks!
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Old 10-19-12, 10:14 AM   #2
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Pull the fuel line off at the carb. Place it in a bottle. Crank car like you're trying to start it. Got fuel flowing into the bottle?

If not, then check the relay, then the pump (in that order. Bad relay is most likely)



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Old 10-19-12, 10:34 AM   #3
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how do i check/ replace the relay if thats the probem?
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Old 10-19-12, 10:39 AM   #4
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You should look at Foxed.ca for the Service manuals Mike.
I use them all the time.
If you had a 2nd gen I would be all over your questions like Kanye on a Kardashian.
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Old 10-19-12, 10:51 AM   #5
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yeah i went threw this already, it says nothing in the components list about a fuel relay or anything like that. anyone know if its called something else?
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Old 10-19-12, 11:17 PM   #6
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problem fixed! thanks alot guys

But know i think it may be pumping too much? the barrels of the intake and choke keep getting filled/flooded with fuel. Alot the fuel is like the color of redbull? its getting cleaner and clearer but still really darkish yellow... is that a rusted tank? or old fuel?
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Old 10-20-12, 12:19 AM   #7
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You should flush/drain all the old fuel or you are just asking for trouble,especially with a carbed system.
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Old 10-20-12, 01:06 AM   #8
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okay, and why is the barrels filling with gas? is this normal?
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Old 10-20-12, 01:15 AM   #9
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Pump is only supposed to be at a certain psi.(like 6,I think)
it allows the fuel into the bowl by the needle valve.When the bowl fills,the float is supposed to shut the needle valve.so no more gas enters the bowl.When the bowl starts to drain from Use then the needle valve opens and gas goes into the bowl again.(never ending cycle)
If the needle valve is under too much pressure then it remains open,the float is stuck up top and the gas will flow out into the engine.
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Old 10-20-12, 02:39 AM   #10
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The pump is probably fine, but your float needles might be sticking. Try banging on the top of the carb with something that won't damage it. Sometimes you can "shake" them loose. Otherwise you will have to pull the top half of the carb off and clean them up.

Edit: I just saw in your other thread that you replaced the pump with something "totally different". What did you put in there? You need a low pressure/high volume pump...
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Old 10-20-12, 11:26 AM   #11
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the pump that i used doesnt look anything like the old one i mean... the old one is alot smaller.
But the pump i ordered was suposed to work for my rx7
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Old 10-20-12, 01:27 PM   #12
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if the secondarys are leaking i would suspect a serious vacuum leak. had one of my block off plates come loose and it kept on trickling in and would be a PAIN to restart. only the drivers side should be dripping fuel when idling. if thats what you mean by "filling up the barrels" which i assume it is.

on a side note you really need another filter up front that you can keep an eye on cause if the gas is nasty up top imagine what the filter looks like underneath that you cant see. you were better off draining it and starting over. you may ruin the carb and have to rebuild it which yous should do anyway.

and why did you put in premium gas? or did you mean premium as in like new instead of redbull? they run on regular only turbos need the higher octane

what brand or part # pump? you could have one thats too strong..
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Last edited by Rotor_Venom08; 10-20-12 at 01:32 PM.
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Old 10-20-12, 01:45 PM   #13
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if the secondarys are leaking i would suspect a serious vacuum leak. had one of my block off plates come loose and it kept on trickling in and would be a PAIN to restart. only the drivers side should be dripping fuel when idling. if thats what you mean by "filling up the barrels" which i assume it is.

on a side note you really need another filter up front that you can keep an eye on cause if the gas is nasty up top imagine what the filter looks like underneath that you cant see. you were better off draining it and starting over. you may ruin the carb and have to rebuild it which yous should do anyway.

and why did you put in premium gas? or did you mean premium as in like new instead of redbull? they run on regular only turbos need the higher octane

what brand or part # pump? you could have one that's too strong..
wait what? im not too sure what your trying to say... here is a picture of the receipt for the part # and also the barrels and choke that keep filling with gas. it will literally be filled up to the top within 1 minute

Click the image to open in full size.
[IMG]Click the image to open in full size.[/IMG]

like i said i really do not know my way around a car.. any help is much appreciated

Last edited by Mike.u4c; 10-20-12 at 01:50 PM. Reason: spelling/photo
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Old 10-20-12, 02:12 PM   #14
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the barrels on the right are the ones im talking about those are the secondary's, they should only drip in gas under high load. they should not be leaking at all while idling. if they are you either A: have to much PSI from the fuel pump, or B: a massive vaccum leak

as far as the pump in concerned check the box for the part number, what brand and part # it is, is important. the receipt wont tell you squat.
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Old 10-20-12, 02:28 PM   #15
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it is a carter fuel pump... and the only thing that looks anything like a part number is p60504 or 301304
or fp187
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Old 10-20-12, 05:53 PM   #16
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Quote:
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it is a carter fuel pump... and the only thing that looks anything like a part number is p60504 or 301304
or fp187
That pump is rated at 4 psi. That seems a bit low to me. But did you leave the in line filter attached as it came in the box? It doesn't draw enough pressure like that you have to put a longer hose between the filter and pump. I've been there before. I run a carter pump not sure of what # but. It should be fine.

Is it indeed filling up the secondaries?
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Old 10-20-12, 06:00 PM   #17
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That pump is rated at 4 psi. That seems a bit low to me. But did you leave the in line filter attached as it came in the box? It doesn't draw enough pressure like that you have to put a longer hose between the filter and pump. I've been there before. I run a carter pump not sure of what # but. It should be fine.

Is it indeed filling up the secondaries?
yeah it fills everything. and yes i left the filter on, so i need to make the hose between them bigger?
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Old 10-20-12, 06:45 PM   #18
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yeah you do, i had the same problem with mine before it came like that. just goto an auto parts store and buy a ft of hose for 30 cents. it oly needs to be like 4-5 inches. as long as its longer that how it is now.

how does it run when it is running? will it stay running? is it rough?
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Old 10-20-12, 07:08 PM   #19
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okay cool, i can do that np. Thanks

And yeah it runs really rough, but i think thats in part to the old gas (which has been changed out) and because we had to "unsieze" the engine with penetrating oil. lots of smoke but i was told that is to be expected.

if this fixes the fuel problem i will be moving on too the clutch/transmission problem that i have no idea about lol.
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Old 10-25-12, 12:43 AM   #20
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In my life I have forgotten a few things. One thing i do remember is that a stock first gen fuel pump is rated at 3.5 psi. and 6 psi is too much. You may need a fuel preasure regulator
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Old 10-25-12, 12:46 AM   #21
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way way too much fuel pres. can actually bend the little tabs the regulate float level in the bowls.
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Old 10-25-12, 12:46 AM
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2004, 60504, 82, carter, filter, fuel, gas, inline, problem, psi, pump, pumping, putting, rx7, wiring

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