Question about 1994 Volvo 850

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94 Volvo 850, crank & no start, no codes & injectors not firing

Several months ago my wife stopped at the store for 5 min when she tried to start the car nothing happened not even a click but overdrive arrow was flashing. Tow to the shop I worked at & in the morning started. It ran fine for several months till the other day the same thing happened to me. I banged on the starter & it cranked up only to happen again later in the day.also I will add that I could not retrive any codes & the diagnostic led (red light) has a soft glow like a power problem. I have replaced the ignition switch the pnp switch the starter the crank sensor & it will crank but no start getting spark but injector's are not firing also the overdrive arrow still flashes with the key on. I have been working at a shop that caters to Volvo's for 5 years & this one even has them scratching their head's (good fuel pressure at rail)

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Fuel injection Relay! These things fail more when it is warm out (during the summer etc). It is a large relay located under the hood inside the fuse box. It is about the size of 2 relays put together. It is either red or green. When it gets hot out, the relay swells up an separates and causes the car to stall out intermittently.

Posted on May 09, 2017


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SOURCE: 94 Volvo 850, crank & no start, no codes & injectors not firing

check the main lume harness plug for corrosion or been hot

Posted on Mar 20, 2010

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