Intermittent Power Problem

Mr bountyfull · 5th October 2019, 17:38

Hello all

The fault - 1. Under very heavy acceleration the car has cut out (twice up a hill asking for everything) normal driving no real issues. 2 Starting not as easy as it should be some times no cranking at all. If I leave it a few second it might start with a lot of cranking, pumping accelerator etc.

I know I need a T4 session (I have been in contact with Chris but no suitable date for both of us)

Suggestions welcome in the meantime.

Regards

Rogue · 5th October 2019, 17:54

Maybe the UBP?

marinabrian · 5th October 2019, 19:12

You don't need a T4 session, what you need is a injector leakback test carried out to determine which injector(s) is/are at fault.

The car will start better from stone cold, and fairly poorly when hot, requiring longer to crank than when cold

Brian

Mr bountyfull · 5th October 2019, 21:09

Thanks Brian, I thought it could be a leaky injector.

Mr bountyfull · 12th October 2019, 14:54

Fault found with leaking injector on cylinder 1. Swapped for used (£20) injector bought from a member here and now running how it should. All in £60 well spent.

Thanks for the help.

marinabrian · 12th October 2019, 15:49

Excellent stuff, and a nice easy fix too

Number one injector is the only one that doesn't need the inlet manifold removed to replace it.

Brian

peelaaa · 12th October 2019, 15:52

Quote:

Originally Posted by Mr bountyfull

Fault found with leaking injector on cylinder 1. Swapped for used (£20) injector bought from a member here and now running how it should. All in £60 well spent.

Thanks for the help.

Hi, were there any dash warning lights?

marinabrian · 12th October 2019, 16:17

Quote:

Originally Posted by peelaaa

Hi, were there any dash warning lights?

I would say not

Mr bountyfull · 13th October 2019, 00:46

No, no warning lights.

5th October 2019, 17:38	#1
Mr bountyfull Gets stuck in MGZTV8 Join Date: Aug 2008 Location: Newbury Posts: 567 Thanks: 173 Thanked 82 Times in 58 Posts	Intermittent Power Problem Hello all The fault - 1. Under very heavy acceleration the car has cut out (twice up a hill asking for everything) normal driving no real issues. 2 Starting not as easy as it should be some times no cranking at all. If I leave it a few second it might start with a lot of cranking, pumping accelerator etc. I know I need a T4 session (I have been in contact with Chris but no suitable date for both of us) Suggestions welcome in the meantime. Regards

5th October 2019, 17:54	#2
Rogue I really should get out more....... 75 CDT SE 160 Saloon Join Date: May 2017 Location: Thorpe St Andrew, Norwich Posts: 2,653 Thanks: 1,386 Thanked 1,096 Times in 774 Posts	Maybe the UBP? __________________ Glutton for punishment --- Previously ... 2.6 SD1 x 2, 3.5 SD1, 820S, 820Si x2, 216 Gsi, 220T saloon, 414, 45 1.4 x2 and now a Cowley 75 CDT

5th October 2019, 19:12	#3
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	You don't need a T4 session, what you need is a injector leakback test carried out to determine which injector(s) is/are at fault. The car will start better from stone cold, and fairly poorly when hot, requiring longer to crank than when cold Brian

5th October 2019, 21:09	#4
Mr bountyfull Gets stuck in MGZTV8 Join Date: Aug 2008 Location: Newbury Posts: 567 Thanks: 173 Thanked 82 Times in 58 Posts	Thanks Brian, I thought it could be a leaky injector.

12th October 2019, 14:54	#5
Mr bountyfull Gets stuck in MGZTV8 Join Date: Aug 2008 Location: Newbury Posts: 567 Thanks: 173 Thanked 82 Times in 58 Posts	Fault found with leaking injector on cylinder 1. Swapped for used (£20) injector bought from a member here and now running how it should. All in £60 well spent. Thanks for the help.

12th October 2019, 15:49	#6
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	Excellent stuff, and a nice easy fix too Number one injector is the only one that doesn't need the inlet manifold removed to replace it. Brian

13th October 2019, 00:46	#9
Mr bountyfull Gets stuck in MGZTV8 Join Date: Aug 2008 Location: Newbury Posts: 567 Thanks: 173 Thanked 82 Times in 58 Posts	No, no warning lights.