Volvo Owners Club Forum

Volvo Owners Club Forum (https://www.volvoforums.org.uk/index.php)
-   700/900 Series General (https://www.volvoforums.org.uk/forumdisplay.php?f=14)
-   -   Engine won't rev and hunts (https://www.volvoforums.org.uk/showthread.php?t=298517)

ANDTWENTY Sep 19th, 2019 10:39

Just checked the alternator and you guys were right, the alternator was wired wrong, I had put the small red wire on the wrong terminal (guessing it's the rpm for the diesel) I put it on the other one and all the dash lights have gone off!! Still have the hunting issue though

Laird Scooby Sep 19th, 2019 10:53

Quote:

Originally Posted by ANDTWENTY (Post 2555120)
the alternator is giving 14V to the battery when the car starts so would assume that the alternator is working, it was a second hand one off a diesel so perhaps the thin red spade connector I put in the wrong spade on the alternator?

Can you get a photo of the back (connection) side of the alternator? As hi-res/big as possible really.

As i said way back in the thread, if the alternator isn't charging it will cause bad running, some systems take the field (warning light) voltage to determine this and as your warning lights aren't going out, the fuel ECU will register lack of charge, regardless of what the alternator is putting out.

ANDTWENTY Sep 19th, 2019 10:59

https://i.postimg.cc/bZZFqwMS/IMG-20190919-105657.jpg
If you click on it then it should take you to the proper image I think.

As I say though, now I changed the small wire my dash lights are all out except for abs which I guess has an issue?

mocambique-amazone Sep 19th, 2019 11:12

TPS


TPS


Still TPS


The engine management get the signal:
Foot of accelerator - throttle closed
Result: switch of fuel to save energy ( overrun fuel cut off)

It's really simple, trust me.


And again:
-Remove the throttle body
-clean the butterfly
-adjust the gap between butterfly and housing
-glue the screw with paint, never touch this again.( Everyone who is working on this screw should be punished)
-adjust the TPS
-mount the throttle body
-adjust the rod

There will be only one other fault: broken wire between TPS and ECU.

Can't believe this by having a closer look to the engine bay


Good luck, Kay

ANDTWENTY Sep 19th, 2019 11:13

Just checked timing, I have been taking the longer mark as 0° is this correct?
https://i.postimg.cc/FYv74Y1D/IMG-20190919-110925.jpg

If so then I lined up the crank pulley with that one if you look square on at the plate which is slightly off set.
https://i.postimg.cc/mh0PmX4x/IMG-20190919-110716.jpg

I then looked at the cam which is marked with white pen and also appears to be out slightly. Could this be the issue or am I referencing it to the wrong marks, guessing these white marks aren't original marks?
https://i.postimg.cc/0bDbFY5z/IMG-20190919-110727.jpg

mocambique-amazone Sep 19th, 2019 11:14

ABS light will go out if you drive the car

ANDTWENTY Sep 19th, 2019 11:16

Quote:

Originally Posted by mocambique-amazone (Post 2555143)
TPS


TPS


Still TPS


The engine management get the signal:
Foot of accelerator - throttle closed
Result: switch of fuel to save energy ( overrun fuel cut off)

It's really simple, trust me.


And again:
-Remove the throttle body
-clean the butterfly
-adjust the gap between butterfly and housing
-glue the screw with paint, never touch this again.( Everyone who is working on this screw should be punished)
-adjust the TPS
-mount the throttle body
-adjust the rod

There will be only one other fault: broken wire between TPS and ECU.

Can't believe this by having a closer look to the engine bay


Good luck, Kay

I did try adjusting the TPS bit made no difference. I'll take it off give it a clean and put it all back then. What exactly do you mean by adjust the gap between the butterfly, what should it be?
Do you want some pictures of the engine bay, what of?

mocambique-amazone Sep 19th, 2019 11:18

Quote:

Originally Posted by ANDTWENTY (Post 2555144)
Just checked timing, I have been taking the longer mark as 0° is this correct?
https://i.postimg.cc/FYv74Y1D/IMG-20190919-110925.jpg
wrong : tdc is 1 inch to the right.

If so then I lined up the crank pulley with that one if you look square on at the plate which is slightly off set.
https://i.postimg.cc/mh0PmX4x/IMG-20190919-110716.jpg

I then looked at the cam which is marked with white pen and also appears to be out slightly. Could this be the issue or am I referencing it to the wrong marks, guessing these white marks aren't original marks?
https://i.postimg.cc/0bDbFY5z/IMG-20190919-110727.jpg

everything is OK, nothing to worry about

mocambique-amazone Sep 19th, 2019 11:22

Quote:

Originally Posted by ANDTWENTY (Post 2555146)
I did try adjusting the TPS bit made no difference. I'll take it off give it a clean and put it all back then. What exactly do you mean by adjust the gap between the butterfly, what should it be?
Do you want some pictures of the engine bay, what of?

Small gap, hold the body in front of a light. If you turn out the screw the butterfly will touch the body. Turn in the screw till you see a small gap, like crescent. Secure the screw, check again.

No pics needed

ANDTWENTY Sep 19th, 2019 11:35

just removed the TPS and it seems to be filled with wd-40, unless someone's taken this off and put it in how else could this get in unless its meant too be there for some reason?


All times are GMT +1. The time now is 13:21.

Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.