Question about 1991 Mazda RX-7

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91 rx7 man

No start has 30 psi fuel,pressure and will fire if starting fluid shot in

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Please rate me fixya!
this is all I can find...
91 rx7 man - fd36ce6.jpg

Posted on Jul 02, 2008

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Believe it or not if it has the wrong plugs or they are dirty i would check them fist pull out the primarys which are the ones on top in both housings first check if they are dirty and smell if they are covered in fuel if they are make sure you change them with the correct plug that has the four prongs at the top of the plug also check the secondary plugs for the same wear.
please leave feedback
cheers

Posted on Jul 02, 2008

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1 Answer

Fuel pumps are not working fires up if u spray start fluid in carb


It would greatly help to know make, model, and year, but in general you check fuel pump pressure with a gauge, and if the pump is electric, it always has a relay so there is the ability to have a safety cut out. Some vehicles use lack of oil pressure to cut out the pump relay, but most use the alternator output. Fuel injection usually has from 20 to 40 psi fuel pressure, and carb systems from 3 to 10 psi.

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It drops when it is turned off through the return the pump might be getting weak If you keep using the starting fluid you will blow the intake off of it or it will get hooked on it and won't start without it.

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I have a 1999 GMC Yukon getting fuel, spark and even cranking good at times. Then if I turn it off for a while, I have to squirt a shot of starting fluid into the intake hole and it cranks over & over...


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1 Answer

Died suddenly wont restart. turns over but wont fire.starting fluid made it start right up till it burned out then died again.fuel pump,pressure reg. ,filter?


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1 Answer

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What about the fuel filter????? Have you changed it out??? If you can spary something like a started fluid, that means it is a fuel problem. My last check, it has to be above 50-psi on the fuel pressure to make it run right. I had 35psi, but whould not get over 30mph or down hill maybe 45mph. Check both filter & pressure, but check pressure with a New fule filter!!!!

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