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2000 C70 2.4 T (B5244T) has spark + fuel

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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DeadEric
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Re: 2000 C70 2.4 T (B5244T) has spark + fuel

Post by DeadEric » Wed May 01, 2019 7:55 am

I noticed in the video that your intake timing mark stops at the same spot both times. It goes around once freely then stops on the second go around.

I don't know what that means exactly but I think it's a clue. Points to mechanical in my mind, hopefully someone more knowable can chime in.



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Re: 2000 C70 2.4 T (B5244T) has spark + fuel

Post by abscate » Wed May 01, 2019 8:03 am

Go through and systematically check that the coils are in the right place. I can see that the loom has been reworked - it might be the colour coding has been changed so you will have to sort that out somehow

That kick and backfire is indicative of spark being there but on the wrong cylinder.

You do have an ignition problem of some kind, or timing of valves.


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Kerpre
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Re: 2000 C70 2.4 T (B5244T) has spark + fuel

Post by Kerpre » Fri May 10, 2019 5:41 pm

Thanks for your reply mate

Cam and crank sensors are good (giving signal) and no codes

Compression on each cyl is at least 155psi so I don’t think it’s washed the rings.

I’ll list off a few things I’ve checked. If you can thi k of anything g else that would be great. Also how do I check the tps? I though this vehicle has an electronic throttle body.

So,
Compression is all atleast 155psi on all cyl
Fuel at the rail is 48psi
Injectors are cycling (have removed rail and cranked over)
Timing appears to be spot on.
No codes for anything(using obd2 memo scanner)
Good strong spark
Cam and crank sensors have been pulled and bench tester and checked out.

I just can’t think of anything else it may be.

Thanks for your help

Kerry



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Re: 2000 C70 2.4 T (B5244T) has spark + fuel

Post by RickHaleParker » Fri May 10, 2019 6:12 pm

Kerpre wrote:
Fri May 10, 2019 5:41 pm
I just can’t think of anything else it may be.
Make sure the Coil Pack Loom is connected in the correct order.
There is one striped wire that is a different color for each cylinder.

Per the Electrical Wiring Diagram (EWD).
Cylinder 1 Yellow-Black.
Cylinder 2 Orange-Black
Cylinder 3 Blue-Black
Cylinder 4 Green-Black
Cylinder 5 Yellow-Red.
Last edited by RickHaleParker on Fri May 10, 2019 6:17 pm, edited 1 time in total.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

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Re: 2000 C70 2.4 T (B5244T) has spark + fuel

Post by Sommerfeldt » Fri May 10, 2019 6:15 pm

What RHP said.

Also, can you hook that thing to VIDA and see if you get any feedback there? Only other thing I can think of would be immobilized issues, but that should set a code.

- S


'96 855 T5, R bumper and spoiler, Koni Yellows & blue H&R springs all 'round.

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Re: 2000 C70 2.4 T (B5244T) has spark + fuel

Post by Kerpre » Fri May 10, 2019 10:21 pm

Hey guys thanks for the posts.

Ignition cables are all matching up apart from cyl 4
I have black with grey stripe.

I’ve decided I’m going to re-time her and see how we go from there



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Re: 2000 C70 2.4 T (B5244T) has spark + fuel

Post by RickHaleParker » Fri May 10, 2019 11:43 pm

Had a '97 S90 that flat refused to start unless the camshaft position sensor was disconnected. Turned out the PO had gotten the blocking cup on the end of the camshaft installed 180° off. Corrected that and it fired right up with the camshaft position sensor connected.

My S40 would not start after a timing belt service. Disconnected the camshaft position sensor then with some extended cranking it started.

Worth a shot to disconnect your camshaft position sensor and give it a try.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

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Re: 2000 C70 2.4 T (B5244T) has spark + fuel

Post by Kerpre » Sat May 11, 2019 12:15 am

Alrighty fellas!! After 6 months of struggle, the c70 lives! Runs a little rough but she is running ! Thank you Rick for posting the ignition wiring, my 1 &2 cylinders were around the wrong way and marked as Sony the prev owner 😓 I should of bloody checked

Thank you again guys
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Sommerfeldt



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Re: 2000 C70 2.4 T (B5244T) has spark + fuel

Post by Sommerfeldt » Sat May 11, 2019 2:00 am

Nice! All’s well that ends well! :)

- S


'96 855 T5, R bumper and spoiler, Koni Yellows & blue H&R springs all 'round.

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Re: 2000 C70 2.4 T (B5244T) has spark + fuel

Post by RickHaleParker » Sat May 11, 2019 2:20 am

Let me guess ..... had trouble telling the Yellow from the Orange.
There is a reason electrical guys insist on good lighting.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

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