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1992 mazda b2600i running rough and rich new fuel pump and tune up

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Posted on Jan 02, 2017

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toneman2121
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SOURCE: Mazda B2600i

are there any fault codes present? i was looking at the fuel injection diagram on autozone.com and the only thing i can see that controls injector pulse width is the pcm. are all the injectors open for 15ms? you should also check fuel pressure. if you want to look at the diagram, go to autozone.com. register and enter you car. select repair guides, chassis electrical and the wiring diagrams

Posted on Mar 30, 2010

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1990 mazda b2600i. The fuel injection 30amp fuse blows every time I turn the key to the on position. What's could be the problem


Faulty fuel pump or fuel pump relay. Locate the fuel pump relay. Remove it. And turn the key on again. Check if fuse is holding.

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I have a 1993 mazda b2600i. The fuel pump randomly shuts off. Repaced fuel pump shut off relay lines cleaned tank. Once it shuts off cant even get it turn on when bypassing fuel cutoff relay.


There is a chance that your pump itself is going bad. Just like a starter that is on its way out. if you tap on it sometimes the brushes will make contact enough for it to go ahead and start, a fuel pump motor has brushes and an armature. Sometimes they will not make contact and work, then other times they can run fine for a bit.

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My 1991 Mazda b2600i doesn't seem to be getting


Have a fuel pressure test done on the fuel manifold to check for pump, filter and fuel regulator problems. Run fault codes to check for evap canister solenoid problems

Sep 14, 2013 | Cars & Trucks

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When my 93 mazda b2600 is cold it will try to start for a second or two with the engine bouncing around. It will do this four or five times. If I leave it in the start position for a minute then try to...


Could be a problem with the fuel hose connections. When cold they expand allowing the system to **** air. Warm they contract making a better seal. Try clamping the connections to the filter and on the tank.

Mar 23, 2011 | 1992 Mazda B-Series

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I have a mazda b2600i p/u, 33,000 mi. Ran great, then out of the blue started to run very rough, black smoke, etc. I have had the distrb cap, plugs, plug wires, fuel filter, everything changed. Fuel...


Check the EGR valve..

EGR valve is bolted to the manifold on passenger side, just underneath the carburetor. There are three hex head screws, requires 10mm socket.

Nov 02, 2010 | 1991 Mazda B-Series

1 Answer

Mazda B2600i


are there any fault codes present? i was looking at the fuel injection diagram on autozone.com and the only thing i can see that controls injector pulse width is the pcm. are all the injectors open for 15ms? you should also check fuel pressure. if you want to look at the diagram, go to autozone.com. register and enter you car. select repair guides, chassis electrical and the wiring diagrams

Mar 30, 2010 | Mazda B2600 Cars & Trucks

2 Answers

Running rich, smelling rich


You may have a bad fuel injector or in need of a tune up badly. The early fuel injection (throttle body) had a single fuel injector that would clog and not spray fuel in a mist but would dump fuel. Does it run rough at idle? That is a good indicator. Some are rebuildable but I would suggest replacement. If you have not had a tune up in a while that should be done too.

Jan 24, 2010 | 1994 Pontiac Grand Prix

1 Answer

Rough idle


check you throttle position sensor first then fuel pressure regulator, then fuel pump. i have a 92 and had to recently do a massive overhaul. my rough idle was caused by a malfunctioning tps with a small exaust leak causing it to race and an intake manifold gasket. also check your idle speed adjustment settings.

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