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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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850 non starting self diagnosisViews : 1636 Replies : 26Users Viewing This Thread : |
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Jan 23rd, 2013, 23:32 | #1 |
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850 non starting self diagnosis
Well, ive had loads of loads of issues with this dam car now.
Original fault, car broke down , Signal wire to coil had gone bad and wasnt sending signal to coil to spark. Re wired and all was good. Then when cold the car is hard to start takes ages to crank to throw a spark. once started car is usually ok. Performed self diagnoses as still having issues, got it to throw a code, but couldnt read it?? The idle control valve was buzzing with the ignition off?? Started car then turned off, turned to position 2 and read the codes , NON stored?? Started the car and the cel light went out and the buzzing stopped. really confused, Car is obd 1 with the self code reader under bonnet. made the car do a self test ie runing fan and clicking coil, and injectors. still no fault? I Have replaced everything on the car ignition wise, and still have a cold starting issue, and its worse when the car is left for a long time. Its electric related as i know there is no spark for at least 10 to 15 cranks when cold. Any ideas? will be scraping the car soon as cant find the course.
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Jan 23rd, 2013, 23:53 | #2 |
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I know this is going to be silly but the battery how old is it and what voltage is in it
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Jan 24th, 2013, 00:10 | #3 | |
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Quote:
Cam sensor and crank sensor also tested fine. Car was scoped by a auto electrician also. no fault found. Coil has no spark out put when cold for around 10 cranks, car hasnt got a chip key nor imobiliser.
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HLM304, Forge unos 17.5psi at 3.8 bar, 18t, Me7 Manifold, Blues, Walbro, De-cat, Ported n Polished Head, 3" Dp stainlesss exhaust, Carbon Air intake, Polly Bushed thoughout. |
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Jan 24th, 2013, 00:53 | #4 |
Volvo lump in a renault!!
Last Online: Jan 11th, 2024 18:06
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Are you sure its the coil and not the dizzy? Only reason I ask is because I had similar symptoms to you recently - I could crank it for 10 minutes and still get no starting. When it would eventually start it wasn't firing on all 5 and would cough, splutter, slow down, speed up etc. When I popped the hood I could hear the dizzy clicking - when I looked closer it was sparking all over the place (the plastic was so knackered you could see the spark!).
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Renault Safrane 2.5 with the Volvo B5254FS 850 2.5 20v engine. It's the same block using Volvo parts but with a few 'adjustments' |
Jan 24th, 2013, 08:03 | #5 | |
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Quote:
I ve replaced everything inc cap and rotor, plugs leads, coil n module, ecu, cam and crank sensors plugs, injection relay, fuel pump relays etc etc
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HLM304, Forge unos 17.5psi at 3.8 bar, 18t, Me7 Manifold, Blues, Walbro, De-cat, Ported n Polished Head, 3" Dp stainlesss exhaust, Carbon Air intake, Polly Bushed thoughout. |
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Jan 24th, 2013, 08:28 | #6 |
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HI mate along shot but have you got a loose pulley on cam belt side or a broken locating pin on the dissy/ rotor. I had a very similar problem on a motorcycle it turned out to be a worn wood rough key on the magneto. good luck rob
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Jan 24th, 2013, 10:11 | #7 |
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Worth a check, will have a look
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HLM304, Forge unos 17.5psi at 3.8 bar, 18t, Me7 Manifold, Blues, Walbro, De-cat, Ported n Polished Head, 3" Dp stainlesss exhaust, Carbon Air intake, Polly Bushed thoughout. |
Jan 24th, 2013, 13:45 | #9 |
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Seen similar with a mates 96 850, in the end changing the electrical portion of the starter switch cured the issue, his was doing the same as yours, no spark/ wouldn't start then randomly the faulty contact in the ignition switch would make letting the ignition fire up and the car would start.
He changed crank sensor, cam sensor and a whole raft of other bits from a spares car that was known to work all to no avail until we nailed it down to the switch - Mike |
Jan 24th, 2013, 17:06 | #10 |
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Pritty sure its not that as it stinks of fuel after firing ie flooding itself. ran a ht tester out of coil, and there definatly no sparks for the 1st few turns of the engine
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HLM304, Forge unos 17.5psi at 3.8 bar, 18t, Me7 Manifold, Blues, Walbro, De-cat, Ported n Polished Head, 3" Dp stainlesss exhaust, Carbon Air intake, Polly Bushed thoughout. |
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