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by davhaney
13 Jun 2022, 19:30
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: Cracked valve cover on removal - 94 volvo 850
Replies: 2
Views: 506

Cracked valve cover on removal - 94 volvo 850

So while removing bits to pull the head, I cracked the valve cover. I think this was from putting uneven stress on the camshaft while removing from the head. The bit which is broken (I think) is mainly responsible for preventing too much lateral play in the shaft. Do I need to replace the valve ...
by davhaney
02 Mar 2020, 21:49
Forum: C30, C70 2006+, S40 & V50 2004 ½ +
Topic: No fuel pressure at Rail. Replaced fuel pump. Swapped PEM, fuel pressure sensor, relay. Checked CEM, all connectors.
Replies: 7
Views: 16120

Re: No fuel pressure at Rail. Replaced fuel pump. Swapped PEM, fuel pressure sensor, relay. Checked CEM, all connectors.

Following up: I cleaned all chassis ground connections, then disassembled and tested the fuel pump relay. The contacts were tarnished/burned - I cleaned them and re-assembled. The car regained fuel pressure and started.

I suspect the failing fuel pump caused excessive current or maybe arcing across ...
by davhaney
28 Feb 2020, 13:51
Forum: C30, C70 2006+, S40 & V50 2004 ½ +
Topic: No fuel pressure at Rail. Replaced fuel pump. Swapped PEM, fuel pressure sensor, relay. Checked CEM, all connectors.
Replies: 7
Views: 16120

Re: No fuel pressure at Rail. Replaced fuel pump. Swapped PEM, fuel pressure sensor, relay. Checked CEM, all connectors.

I have my DiCE up and running. Cleared all codes, the following appear after cranking:

CEM-3A07 - Fuel pump faulty signal
ECM-291B - Fuel pump control module - Signal Missing

Will follow up with checking all ground connections, check for open circuits, and swap fuel pump relays. More to come.
by davhaney
22 Feb 2020, 21:22
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: 95 Turbo - Crank but no start, flashing arrow
Replies: 6
Views: 1080

Re: 95 Turbo - Crank but no start, flashing arrow

Few months ago, I had crank but no start with up flashing arrow. It was not the PNP switch -- my TPS sensor had finally worn out. The transmission computer module picked up the error before the ECU, and flagged. The transmission control module uses throttle position to help compute upshift/downshift ...
by davhaney
22 Feb 2020, 19:08
Forum: C30, C70 2006+, S40 & V50 2004 ½ +
Topic: No fuel pressure at Rail. Replaced fuel pump. Swapped PEM, fuel pressure sensor, relay. Checked CEM, all connectors.
Replies: 7
Views: 16120

No fuel pressure at Rail. Replaced fuel pump. Swapped PEM, fuel pressure sensor, relay. Checked CEM, all connectors.

Car: 2005 Volvo S40, 5Cyl Turbo engine B5254T3. Quarter tank of gas.
Problem: Zero fuel pressure at the rail, zero trace of fuel. Immobilizer is not activated, car will fire on starting fluid, but not otherwise. Display says "Reduced engine performance". You can hear some noise from the fuel pump ...
by davhaney
09 Jun 2018, 13:38
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: Volvo 850 is toe-in after accident, even with both tie rods adjusted all the way in
Replies: 8
Views: 2956

Re: Volvo 850 is toe-in after accident, even with both tie rods adjusted all the way in


Is it possible the tie rod arm on the spindle is bent?


Yep. I measured both sides relative to each other, and the rod arm on the spindle is pulled in about 15mm. I am not sure I would have thought of this on my own, so thank you so much for the suggestion.

As far as the insurance situation, I ...
by davhaney
05 Jun 2018, 15:29
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: Volvo 850 is toe-in after accident, even with both tie rods adjusted all the way in
Replies: 8
Views: 2956

Volvo 850 is toe-in after accident, even with both tie rods adjusted all the way in

1994 Volvo 850 base -- long time listener, second-time caller.

Took a minor accident: someone’s car hit the front of the front-left tire with the corner of their bumper. The force pulled apart the inner tie rod joint and knocked the tire off the rim. The intrusive enemy car also bumped the subframe ...
by davhaney
09 Dec 2012, 19:50
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: 1994 N/A 850 - Recurring CEL (EGR flow too high in system)
Replies: 4
Views: 1511

Re: 1994 N/A 850 - Recurring CEL (EGR flow too high in syst

Following up, replacement of the EGR Controller unit positively solved the issue. Thank you!
by davhaney
27 Nov 2012, 16:24
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: 1994 N/A 850 - Recurring CEL (EGR flow too high in system)
Replies: 4
Views: 1511

Re: 1994 N/A 850 - Recurring CEL (EGR flow too high in syst

Lee -

For some reason, I thought A6 1-5-4 was EGR too high. Thank you for correcting me. Testing shows no vacuum at the EGR diaphragm. Tracing back, I show 12 volts being applied on the EGR Controller, showing it's calling for vacuum (I think). Testing the EGR Controller, I show an open circuit ...
by davhaney
26 Nov 2012, 21:29
Forum: 850, S70, V70, C70, V70-XC 1992-2000
Topic: 1994 N/A 850 - Recurring CEL (EGR flow too high in system)
Replies: 4
Views: 1511

1994 N/A 850 - Recurring CEL (EGR flow too high in system)

Hello friends. Longtime lurker, first time poster.

I have a 1994 N/A 850, 160k miles. I have replaced the entire PCV contraption, removed and cleaned the intake manifold, and cleaned the EGR valve itself thoroughly as well as the sensor. Additionally all vacuum hoses and elbows are tight, and ...