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1998 Mazda B2500

Question: B2500 started fine, but stalls at lights and acts like it will not start.

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mgdesigns, 2.5L 4 Cylinder, Franklin, TN, January 25, 2012, 21:40
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When it stalls, no compression, and starter seems to go very fast. The check engine light does not staying on after it restarts. No codes. Seems to have much less power. It stalled 3 times last night in a 20 mile commute. The last left me powerless at had to force it into the driveway. I have newish plugs on passenger side, and 130K miles on the drive side (they need changing, but it hard to get in there). Help please. Thanks.

211000 miles and other than 4 fuel pumps and 2 Mass Air Flow Sensors, it has been a pretty reliable truck.1st fuel pump at 2000 miles, 2nd at 65000, 3rd at 125000. The last time it acted like a fuel pump was out it was a $12 relay, not $1200 fuel pump & service. Makes me wonder. But I have to get this figured.

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, January 25, 2012, 21:53
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    An engine that turns over quickly sounds like a broken timing belt but a broken timing belt isn't going to repair it's self and then and then repeat the symptom again. If valve lifters pumped up it could hang open valves and allow the engine to crank over quickly but neither of these scenarios are likely. Also I would expect a code. Repeated fuel pump failure or a pump only lasting 50k average is not right, and MAF every 100K sounds odd. A professional grade scan tool allows you to look at a lot of key engine senors and see if any of them seem out of range. I wish I could help but would really need to hear the engine crank over and do tests. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

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    mgdesigns, January 25, 2012, 22:05
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    Thanks for the rapid reply. I will checkout the link.

    What about CPS - Crank Position Sensor - will that throw a code if it's on the fritz, or intermittent?

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