Broken Down again! - Page 3

aardvarkash10 · Jun 13th, 2017, 10:06

This thread takes you through my diagnostics for a similar fault. Mine turned out to be ignition amplifier. YMMV.

The point is more that you absolutely have to follow a good diagnostics procedure. Anything else is a guess.

Let us know if you need a hand!

James_N · Jun 13th, 2017, 10:23

Quote:

Originally Posted by aardvarkash10

This thread takes you through my diagnostics for a similar fault. Mine turned out to be ignition amplifier. YMMV.

The point is more that you absolutely have to follow a good diagnostics procedure. Anything else is a guess.

Let us know if you need a hand!

I had ignition amp problems with my 740, just as i got into calais for my holiday a good few years ago now. Utter pain in the arse that was!

The issue i have is that this problem has started after replacing that very small heater hose, which makes me wonder if i have knocked or disturbed something.

The problem is, i am just guessing, as i dont have a clue, but as soon as i touch the gas when it starts getting warm, it stutters and dies. no amount of keeping my foot on the gas keeps the engine going, its dying and thats that.

Laird Scooby · Jun 13th, 2017, 10:34

Will it still idle or does it still die? Have matters improved since cleaning or replacing the fuel pump fuse?

James_N · Jun 13th, 2017, 10:51

The temp Gauge gets to about a quarter of the way round the dial (halfway between cold and normal operating temp in the middle). It will idle at that, but if i touch the gas, it will die.

Yesterday i went back to the car, didnt replace anything, and it started right away and i managed to rev it up and it sat there ticking over fine.

I then switched it off, replaced the fuel pump fuse, and started it again and it fired right up, so i just thought i'd leave it ticking over for as long as it would, but as soon as it started getting warm, i thought "i'll just try giving it gas" and it died and wouldn't restart for love nor money.

When you try and start it, it turns over, and when you release the key to stop turning it over, it stutters, like it really wants to fire, but something is stopping it firing when the temp gauge starts getting hot. There is no warming lights that come on, just touch the gas, it stutters and dies, then won't restart until its left for quite a while (probably until the engine goes cold) then it will fire again.

Laird Scooby · Jun 13th, 2017, 11:31

That puts a totally different spin on things. It could either be an air leak on the inlet side or possibly the opposite in the shape of an over-fueling problem caused by perhaps knocking the connector off a temperature sensor while you were changing that hose.

Those are the obvious things that are down to human error - check them first and then you'll have to go through a proper fault finding procedure if you don't find anything.

James_N · Jun 13th, 2017, 11:38

i think i'm going to have to get it towed to a garage. My fuel pump relay has arrived but i'm not convinced thats the problem, i think its probably something i've knocked or something

Laird Scooby · Jun 13th, 2017, 12:17

It certainly sounds that way - the fact it happened after you'd been doing the heater hose is too much of a coincidence to be ignored.

Can you get some underbonnet pics at all? It's possible someone on here may be able to spot something that saves you an expensive bill

James_N · Jun 13th, 2017, 12:29

Quote:

Originally Posted by Laird Scooby

It certainly sounds that way - the fact it happened after you'd been doing the heater hose is too much of a coincidence to be ignored.

Can you get some underbonnet pics at all? It's possible someone on here may be able to spot something that saves you an expensive bill

I'll have a go, and yes the fact its happened after i was messing about (changing the hose by feel as i couldn't see bloody anything) is too much of a coincidence!

I did actually have to sit on the engine at one point as i just couldn't reach, so i'm fairly certain ive dislodged something or knocked something! I just can't see what as everything looks the same!

James_N · Jun 14th, 2017, 08:55

The car has now been fixed. Drove it to work this morning.

It was a slightly more embarrassing problem than i thought and totally self caused!!

Thank you everyone for your help

Veefor · Jun 14th, 2017, 09:13

Oh come on,don't leave us hanging.
What did you dislodge?
Sort of thing I would do,might help someone if they do it.
Promise we won't laugh 😉

Jun 13th, 2017, 10:34	#23
Laird Scooby Premier Member Last Online: Today 08:43 Join Date: May 2012 Location: Lakenheath	Will it still idle or does it still die? Have matters improved since cleaning or replacing the fuel pump fuse? __________________ Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........

Jun 13th, 2017, 10:51	#24
James_N VOC Member Last Online: Jan 4th, 2024 11:32 Join Date: Jan 2006 Location: Stafford View Photos By: James_N	The temp Gauge gets to about a quarter of the way round the dial (halfway between cold and normal operating temp in the middle). It will idle at that, but if i touch the gas, it will die. Yesterday i went back to the car, didnt replace anything, and it started right away and i managed to rev it up and it sat there ticking over fine. I then switched it off, replaced the fuel pump fuse, and started it again and it fired right up, so i just thought i'd leave it ticking over for as long as it would, but as soon as it started getting warm, i thought "i'll just try giving it gas" and it died and wouldn't restart for love nor money. When you try and start it, it turns over, and when you release the key to stop turning it over, it stutters, like it really wants to fire, but something is stopping it firing when the temp gauge starts getting hot. There is no warming lights that come on, just touch the gas, it stutters and dies, then won't restart until its left for quite a while (probably until the engine goes cold) then it will fire again. __________________ 1997 Volvo 940 LPT Celebration. 187,700 miles, manual.

Jun 13th, 2017, 11:31	#25
Laird Scooby Premier Member Last Online: Today 08:43 Join Date: May 2012 Location: Lakenheath	That puts a totally different spin on things. It could either be an air leak on the inlet side or possibly the opposite in the shape of an over-fueling problem caused by perhaps knocking the connector off a temperature sensor while you were changing that hose. Those are the obvious things that are down to human error - check them first and then you'll have to go through a proper fault finding procedure if you don't find anything. __________________ Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........

Jun 13th, 2017, 11:38	#26
James_N VOC Member Last Online: Jan 4th, 2024 11:32 Join Date: Jan 2006 Location: Stafford View Photos By: James_N	i think i'm going to have to get it towed to a garage. My fuel pump relay has arrived but i'm not convinced thats the problem, i think its probably something i've knocked or something __________________ 1997 Volvo 940 LPT Celebration. 187,700 miles, manual.

Jun 13th, 2017, 12:17	#27
Laird Scooby Premier Member Last Online: Today 08:43 Join Date: May 2012 Location: Lakenheath	It certainly sounds that way - the fact it happened after you'd been doing the heater hose is too much of a coincidence to be ignored. Can you get some underbonnet pics at all? It's possible someone on here may be able to spot something that saves you an expensive bill __________________ Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........

Jun 13th, 2017, 10:06	#21
aardvarkash10 Master Member Last Online: Oct 8th, 2022 22:22 Join Date: Sep 2016 Location: Auckland	This thread takes you through my diagnostics for a similar fault. Mine turned out to be ignition amplifier. YMMV. The point is more that you absolutely have to follow a good diagnostics procedure. Anything else is a guess. Let us know if you need a hand!

Jun 14th, 2017, 08:55	#29
James_N VOC Member Last Online: Jan 4th, 2024 11:32 Join Date: Jan 2006 Location: Stafford View Photos By: James_N	The car has now been fixed. Drove it to work this morning. It was a slightly more embarrassing problem than i thought and totally self caused!! Thank you everyone for your help __________________ 1997 Volvo 940 LPT Celebration. 187,700 miles, manual.

Jun 14th, 2017, 09:13	#30
Veefor VOC Member Last Online: Today 09:56 Join Date: Jan 2015 Location: Bristol	Oh come on,don't leave us hanging. What did you dislodge? Sort of thing I would do,might help someone if they do it. Promise we won't laugh 😉

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