Momentary loss of power under acceleration

AustinMaxi · 31st May 2019, 17:22

A couple of issues have appeared over the last couple of days.

Firstly under acceleration I've been getting a momentary stutter or hiccup then its its fine again. This has happened three times since yesterday.

Secondly moving slowly in queuing traffic on the way home tonight, the engine struggled to maintain revs when I took my foot off the accelerator. I thought it was going to cut out but a push on the accelerator and it was fine again.

Car is a 1.8T. Plugs are gapped at approx. 0.7mm

Any thoughts welcomed.

planenut · 31st May 2019, 18:08

Check all the vacuum hoses from the turbo especially those to the solenoid on the side of the air filter box, for starters.

AustinMaxi · 31st May 2019, 19:49

As an update, it took three attempts to get the car started this evening, it fired up then can't maintain the revs and cut out.

I had a quick look at the vacuum hoses, but it looks like I'll have to remove the air box to get a good look where it goes into the turbo.

planenut · 31st May 2019, 20:12

Worth looking at the coils as well.

kaiser · 1st June 2019, 05:48

Fuel starvation and or ignition.
I would check the pump, filter and plugs. Including the lid coming off the filter housing.
The 1.8 is very sensitive to plugs not performing well, and obviously also to fuel starvation.

Sheraton · 1st June 2019, 07:57

Quote:

Originally Posted by AustinMaxi

As an update, it took three attempts to get the car started this evening, it fired up then can't maintain the revs and cut out.

I had a quick look at the vacuum hoses, but it looks like I'll have to remove the air box to get a good look where it goes into the turbo.

This doesn't sound like a Boost Control Issue - maybe worth checking the Vac Hoses to get familiar tho.

I'd agree with Kaiser - It's more likely Fueling or Ignition issues.

I'm not sure exactly how the symptoms of "Fuel Filter Separation" exhibit - there is a newer "White Clip" version available as a fix for this if it is the issue.

I'm sure there is plenty info on here r.e Fuel Filter Separation and the Diagnosis/Repair procedure

have you checked for any Fault Codes ?

Paul.

AustinMaxi · 1st June 2019, 08:33

Thanks for the replies.

I had FFS 3 years ago and had the bizzy lizzy clip fitted then.

I checked all the plugs this morning and visually all looked ok and were dry.

I had one spare new coil pack which I put on (when I bought it I thought they came as a pair!). The old coil packs are the ones that were on when I bought the car so have no idea how long they've been on and don't know if they are genuine.

I will get one more coil pack as a precaution so I have a matching pair. I now have one beru (new) and one denso (old).

It started ok this morning but haven't been out in it yet. I could hear the pump priming the system.

I don't have any kit to check for fault codes, but if you can recommend one I'll get it.

Yorkshire GOC · 1st June 2019, 08:57

Failing crankshaft sensor ? Next time if she fails to start keep an eye on the rev counter- if it does not flicker it points to the crank sensor.

31st May 2019, 17:22	#1
AustinMaxi Avid contributor Rover 75 Tourer Join Date: Jan 2015 Location: Newcastle Upon Tyne Posts: 122 Thanks: 6 Thanked 7 Times in 5 Posts	Momentary loss of power under acceleration A couple of issues have appeared over the last couple of days. Firstly under acceleration I've been getting a momentary stutter or hiccup then its its fine again. This has happened three times since yesterday. Secondly moving slowly in queuing traffic on the way home tonight, the engine struggled to maintain revs when I took my foot off the accelerator. I thought it was going to cut out but a push on the accelerator and it was fine again. Car is a 1.8T. Plugs are gapped at approx. 0.7mm Any thoughts welcomed.

1st June 2019, 05:48	#5
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	Fuel starvation and or ignition. I would check the pump, filter and plugs. Including the lid coming off the filter housing. The 1.8 is very sensitive to plugs not performing well, and obviously also to fuel starvation. __________________ Worth his V8 in gold

1st June 2019, 08:57	#8
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,063 Thanks: 1,842 Thanked 623 Times in 469 Posts	Failing crankshaft sensor ? Next time if she fails to start keep an eye on the rev counter- if it does not flicker it points to the crank sensor. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

31st May 2019, 18:08	#2
planenut Regional Secretary Rover 1.8T Tourer Join Date: May 2007 Location: Heathrow Posts: 6,954 Thanks: 1,551 Thanked 2,036 Times in 1,264 Posts	Check all the vacuum hoses from the turbo especially those to the solenoid on the side of the air filter box, for starters.

31st May 2019, 19:49	#3
AustinMaxi Avid contributor Rover 75 Tourer Join Date: Jan 2015 Location: Newcastle Upon Tyne Posts: 122 Thanks: 6 Thanked 7 Times in 5 Posts	As an update, it took three attempts to get the car started this evening, it fired up then can't maintain the revs and cut out. I had a quick look at the vacuum hoses, but it looks like I'll have to remove the air box to get a good look where it goes into the turbo.

31st May 2019, 20:12	#4
planenut Regional Secretary Rover 1.8T Tourer Join Date: May 2007 Location: Heathrow Posts: 6,954 Thanks: 1,551 Thanked 2,036 Times in 1,264 Posts	Worth looking at the coils as well.

1st June 2019, 08:33	#7
AustinMaxi Avid contributor Rover 75 Tourer Join Date: Jan 2015 Location: Newcastle Upon Tyne Posts: 122 Thanks: 6 Thanked 7 Times in 5 Posts	Thanks for the replies. I had FFS 3 years ago and had the bizzy lizzy clip fitted then. I checked all the plugs this morning and visually all looked ok and were dry. I had one spare new coil pack which I put on (when I bought it I thought they came as a pair!). The old coil packs are the ones that were on when I bought the car so have no idea how long they've been on and don't know if they are genuine. I will get one more coil pack as a precaution so I have a matching pair. I now have one beru (new) and one denso (old). It started ok this morning but haven't been out in it yet. I could hear the pump priming the system. I don't have any kit to check for fault codes, but if you can recommend one I'll get it.