The 75 and ZT Owners Club Forums - View Single Post - 1.8T fuel rail fuel pipe fouls alloy inlet manifold

The Mighty Quinn · 12th January 2019, 20:01

Hi and thanks Paul,

Yes, I gapped my plugs to .7 or .75mm some time ago but it made little difference. I've also changed coils and HT leads before, with little effect.

I've not done much with the car (daily driver) these past 18 months or so as I've just been too busy

. But, I plan on having a mini-overhaul completed shortly. I have a new OEM turbo, downpipe, cat, auto box oil cooler and a set of auto box solenoids (having already changed gearbox oil with N402 - oil that came out looked decent, with no obvious swarf on drain plug - and I followed the MGR procedure).

I've had this misfire issue for a long time and whilst it may have gotten slightly worse unbeknownst to myself, the car still runs really well at standard throttle. It's only if I decide to use the throttle that it starts to panic..! The auto box upshift from 3rd to 4th happens far too early in normal driving once the car warms up, so that's why I get the feeling it may be gearbox related, but I think the car is starved of fuel under throttle and misfires have shown up on cylinders 1 and 4 (I think) from garage diagnostics previously. So, I'll see if new injectors help.

I don't mind changing the solenoids or the fuel rail, turbo and cat etc., but I'm certainly no mechanic and unfortunately, no local mechanics I know of are interested in tackling an old Rover that needs super specialist diagnostics equipment to identify troubles.

I think I'll be on my own doing this, but I don't really mind.. If I get it sorted, great. If I don't, well, it wasn't for the want of trying

Regarding the fuel rail, my original steel one definitely strikes the alloy inlet manifold body on my car - I wonder if this might be due to manufacturing variations, seeing as it doesn't happen all of them.. I'm fairly sure that I got it seated correctly when I was fitting it, but maybe not. I've seen second hand TF fuel rails online that are straight (these were the ones originally fitted to the alloy manifolds) - I wonder if it might be worth my while trying to swap over with the new injectors before fitting..

Cheers,
Karl.

12th January 2019, 20:01	#4
The Mighty Quinn Posted a thing or two 2004 mk1 Rover 75 1.8T Club SE saloon (auto) Join Date: Jul 2013 Location: Enniskillen Posts: 1,307 Thanks: 670 Thanked 254 Times in 222 Posts	Hi and thanks Paul, Yes, I gapped my plugs to .7 or .75mm some time ago but it made little difference. I've also changed coils and HT leads before, with little effect. I've not done much with the car (daily driver) these past 18 months or so as I've just been too busy . But, I plan on having a mini-overhaul completed shortly. I have a new OEM turbo, downpipe, cat, auto box oil cooler and a set of auto box solenoids (having already changed gearbox oil with N402 - oil that came out looked decent, with no obvious swarf on drain plug - and I followed the MGR procedure). I've had this misfire issue for a long time and whilst it may have gotten slightly worse unbeknownst to myself, the car still runs really well at standard throttle. It's only if I decide to use the throttle that it starts to panic..! The auto box upshift from 3rd to 4th happens far too early in normal driving once the car warms up, so that's why I get the feeling it may be gearbox related, but I think the car is starved of fuel under throttle and misfires have shown up on cylinders 1 and 4 (I think) from garage diagnostics previously. So, I'll see if new injectors help. I don't mind changing the solenoids or the fuel rail, turbo and cat etc., but I'm certainly no mechanic and unfortunately, no local mechanics I know of are interested in tackling an old Rover that needs super specialist diagnostics equipment to identify troubles. I think I'll be on my own doing this, but I don't really mind.. If I get it sorted, great. If I don't, well, it wasn't for the want of trying Regarding the fuel rail, my original steel one definitely strikes the alloy inlet manifold body on my car - I wonder if this might be due to manufacturing variations, seeing as it doesn't happen all of them.. I'm fairly sure that I got it seated correctly when I was fitting it, but maybe not. I've seen second hand TF fuel rails online that are straight (these were the ones originally fitted to the alloy manifolds) - I wonder if it might be worth my while trying to swap over with the new injectors before fitting.. Cheers, Karl. Last edited by The Mighty Quinn; 12th January 2019 at 20:20..