#1: 1.4hdi throttle when warm issue Author: Chevmat08, Location: PeterboroughPosted: Wed Aug 29, 2018 10:31 am ---- Hi peoples! Picked up a 206 1.4hdi 3dr last night with a bit of a weird problem. When hot, i.e. after a long journey, the throttle is unresponsive if i turn ignition off and back on.
So ill leave the car, come back 10 or so minutes later and itll ti k over fantastic. But its as if im not even touching the throttle. no EML, no other issues i can find. I either have to let it cool down or if i get the car rolling, stomp accelerator a few times and it springs to life.
Any ideas? Also had an aftermarket radio thats wired erong (stays on after ignition off, doesnt hold memory)
Thanks for any help!!
#2: Re: 1.4hdi throttle when warm issue Author: gazza82, Location: South BucksPosted: Wed Aug 29, 2018 11:00 am ---- It could be the crank sensor might be starting to go .. when warm they can stop the car running and OK when cool ..
#3: Re: 1.4hdi throttle when warm issue Author: Chevmat08, Location: PeterboroughPosted: Wed Aug 29, 2018 2:26 pm ---- But the car runs sweet. Just nay throttle when i push it, as though its unpkugged almost. Spoke with an auto electrician who suspected a mechanical fault on injector area, or evu fault because theyre common on this car. But i dont see why heat would contribute to the latter.
Quite a strange one. My dads suggested i blast the engine end with some contact cleaner/GT85
#4: Re: 1.4hdi throttle when warm issue Author: VorTechS, Location: Gloucestershire, UKPosted: Wed Aug 29, 2018 2:40 pm ----
Chevmat08 wrote:
Also had an aftermarket radio thats wired erong (stays on after ignition off, doesnt hold memory)
Thanks for any help!!
Once upon a time this used to be THE most frequently asked question around here. I suspect it might have been one of the influence behind this Beginners Guide
#5: Re: 1.4hdi throttle when warm issue Author: Chevmat08, Location: PeterboroughPosted: Wed Aug 29, 2018 3:18 pm ---- Ive already seen the yellow/red swap meme. I havent bothered looking into it atm as the radio wasnt even fitted. Ripped it out for now
#6: Re: 1.4hdi throttle when warm issue Author: Chevmat08, Location: PeterboroughPosted: Wed Aug 29, 2018 6:45 pm ---- UPDATE: can confirm that getting to 2nd gear then pumping throttle gets it to come back wheb it wont respond... Weird?
#7: Re: 1.4hdi throttle when warm issue Author: Chevmat08, Location: PeterboroughPosted: Fri Aug 31, 2018 5:58 am ---- Has been suggested to me it may be a small air lock in coolant causing a temperature issue but im not sure about that.
#8: Re: 1.4hdi throttle when warm issue Author: gazza82, Location: South BucksPosted: Fri Aug 31, 2018 9:24 am ---- It could ... they migth be some bleed valves on the rad or hoses (we had them on the 2.0 CC but I can't remember seeing them on the 1.4! and I've just drained and refilled my coolant after a core plug issue)
But it's more likely to be the sender in the thermostat housing.
#9: Re: 1.4hdi throttle when warm issue Author: gazza82, Location: South BucksPosted: Fri Aug 31, 2018 9:27 am ----
Chevmat08 wrote:
UPDATE: can confirm that getting to 2nd gear then pumping throttle gets it to come back wheb it wont respond... Weird?
It's a pain to get off but I would check the cat. It should fill the "bulge" in the downpipe .. but on mine it had collapsed to the size of a large grapefruit and was rolling around in the bottom. If it rolled the right way (with a flat side down) the exhaust was OK but if a round side rolled to the bottom it strangled the car. Not great when going up hill and being chased by an artic!!
#10: Re: 1.4hdi throttle when warm issue Author: Chevmat08, Location: PeterboroughPosted: Fri Aug 31, 2018 10:37 am ----
gazza82 wrote:
Chevmat08 wrote:
UPDATE: can confirm that getting to 2nd gear then pumping throttle gets it to come back wheb it wont respond... Weird?
It's a pain to get off but I would check the cat. It should fill the "bulge" in the downpipe .. but on mine it had collapsed to the size of a large grapefruit and was rolling around in the bottom. If it rolled the right way (with a flat side down) the exhaust was OK but if a round side rolled to the bottom it strangled the car. Not great when going up hill and being chased by an artic!!
thabsk for the suggestion. The car drives lovely, idles perfect. No lumpy driving or change in acceleration at all. Just the throttle wont respond when i start the engine after a long drive. No engine ligta, no errors on an OBD reader and no one near me gas PP2000 so im a bit at a loss where to start chasing
#11: Re: 1.4hdi throttle when warm issue Author: Chevmat08, Location: PeterboroughPosted: Fri Aug 31, 2018 4:19 pm ---- Going to change coolant this weekend as what ever is in it has no colour? Im assuming oat?
#12: Re: 1.4hdi throttle when warm issue Author: Steve206, Location: UKPosted: Fri Aug 31, 2018 6:58 pm ---- I would also like to throw into possible consolations the MAF sensor. Next time it plays up try unplugging it and see how it responds.
#13: Re: 1.4hdi throttle when warm issue Author: Chevmat08, Location: PeterboroughPosted: Fri Aug 31, 2018 7:27 pm ---- Weirdly it hasnt happened again... Yet LOL Yes im gonna unplug maf next time. Still waiting foe my Haynes in the post, MAF is just before throttle body yes?
#14: Re: 1.4hdi throttle when warm issue Author: Chevmat08, Location: PeterboroughPosted: Sat Sep 01, 2018 5:08 pm ---- Unplugging a variety of sensors made no difference. Still confused.
#15: Re: 1.4hdi throttle when warm issue Author: wobblycat, Location: walesPosted: Sun Dec 30, 2018 10:13 pm ---- Having the same issue - found a dead glow plug and replaced it, other three are fine.
No clicking sound from glow plug relay when testing on PP2000.
Bought a replacement one and that also doesn't click.
There is power getting to the relay (tested with multi meter).
Not sure if this is even related to the problem.
#16: Re: 1.4hdi throttle when warm issue Author: commandosqueak, Location: Lower SlaughterPosted: Wed Jan 09, 2019 8:19 pm ---- The throttle pedal is electrical on the 1.4 hdi. I had a similar issue with mine and it turned out the pot in the pedal was dodgy and not reading the pedal was pressed. Just a warning though there are two different types of pedal. The earlier one is hard to get hold of. it was changed due to this issue. I think the newer one has an extra wire so it not changeable with the old one. The pedal is becoming hard to come by now. I paid £45 I think for mine for a piece of plastic with a pot in it. Just note though its a royal pain to change if you're not flexible, take my word for it.
Other suggestion is the throttle position sensor.
#17: Re: 1.4hdi throttle when warm issue Author: Chevmat08, Location: PeterboroughPosted: Sat Jan 19, 2019 7:20 pm ---- Hi just an update; still occasionally doing it, much less in the cold weather. 100% temp related as only happens when warmed up i.e. Long journey. This pug has a fsh, had a full rail replacement a year or so ago with glowplugs too so i am hesitant to think thats a cause
#18: Re: 1.4hdi throttle when warm issue Author: Chevmat08, Location: PeterboroughPosted: Sat Jan 19, 2019 7:21 pm ----
commandosqueak wrote:
The throttle pedal is electrical on the 1.4 hdi. I had a similar issue with mine and it turned out the pot in the pedal was dodgy and not reading the pedal was pressed. Just a warning though there are two different types of pedal. The earlier one is hard to get hold of. it was changed due to this issue.
Having the same issue - found a dead glow plug and replaced it, other three are fine.
No clicking sound from glow plug relay when testing on PP2000.
Bought a replacement one and that also doesn't click.
There is power getting to the relay (tested with multi meter).
Not sure if this is even related to the problem.
any luck?
I have been digging online for months off and off and last night I found a very interesting thread.
Identical problem on a fly by wire throttle diesel, different car (1.5dci Clio)
He had a Renault diag machine and managed to locate the cause his issue was a very slight varience in fuel pressure when warm on one of the injectors(very small leak on the seal perhaps). He changed his injector, problem gone.
Now he also mentioned a symptom I forgot. When the throttle is unresponsive,the revs are ever so slightly dipped (around 800-850 instead of 900). He theorised this meant the car didn't rev high enough (again only slightly below normal) and caused the computer to potentially enable a fail safe? Also when his car did resume normally, the fuel pressure rose.
Any ideas what the f*** is going on? Haha
#20: Re: 1.4hdi throttle when warm issue Author: commandosqueak, Location: Lower SlaughterPosted: Thu Jul 25, 2019 8:33 pm ---- glow plugs are only used when its cold. It was over 30 degrees today safe to say they aint coming on. To the OP. you may not have a EML but may still be codes logged. Look on the members map for someone local with pp2000 to help you out. Worse case you can see whats going on and what sensors are doing
#21: Re: 1.4hdi throttle when warm issue Author: gazza82, Location: South BucksPosted: Fri Jul 26, 2019 10:00 am ---- Unlikely Renault and Peugeot would use same system (Peugeot/Citroen share their 1.4Hdi engine with Ford). We have an 1.5dCi in family too and that has had some stalling issues due to glow plugs!! I replaced two .. AA diagosed it as high pressure fuel pump .. my diagnostic said glow plug resistor .. old fashioned multi-meter check showed to deal glow plugs
I had a glow plug resistor fail on my 1.4 Hdi. Didn't think it stopped it starting but did lose power .. but then found that was probably caused by the catalyst collapsing and blocking the exhaust!
Instead of being roughly the size of the cat enclosure in the exhaust downpipe, it was the shape of a large ball and rolling around. As it had one flat side, if if rolled the right way it let the exhaust through. But never when being chased uphill on a motorway by an HGV!
Needless to say it no longer exists .. must add that to the "to-do" list although it is passing MOTs ok without one.
glow plugs are only used when its cold. It was over 30 degrees today safe to say they aint coming on. To the OP. you may not have a EML but may still be codes logged. Look on the members map for someone local with pp2000 to help you out. Worse case you can see whats going on and what sensors are doing
nobody local and had no responses! I had tried already.
I wasn't implying Renault and Peugeot used the same system, rather another diesel fly-by-wire throttle with identical symptoms so it seemed relevant
#23: Re: 1.4hdi throttle when warm issue Author: HueyLions, Location: Midlandshire Near CoventryPosted: Thu Aug 01, 2019 10:40 pm ----
commandosqueak wrote:
glow plugs are only used when its cold. It was over 30 degrees today safe to say they aint coming on. To the OP. you may not have a EML but may still be codes logged. Look on the members map for someone local with pp2000 to help you out. Worse case you can see whats going on and what sensors are doing
In this instance this is an incorrect assumption...purely because the dv4 and dv6 hdi actually use the glow plugs as part of the fap emission system and subsequently are used during driving intermittently.
I have one of these as a daily driver for my wife and we bought it with problems with it dropping into 'limp' and unable to pull itself out of bed...the GP relay had been changed to no avail...and after the previous owner had given up spending money on it I bought it(initially to strip for spares). After a 'live' diagnostic, we changed the glow plugs themselves and hey presto the problem was gone.
I would just like to throw one more possibility into the mix which is a fairly simple but worthwhile check to carry out : Remove the air filter box at the back of the engine and thoroughly inspect the TWO hard plastic fuel pipes that run underneath it for chafing and cracks. This usually causes starting problems but recently at the garage we had one of these that was losing fuel pressure 'under load' initially but picked up again after a series of higher 'revs'. turned out a tiny crack on the bend had formed and we suspect that it was opening and closing with heat and/or the amount of pressure the pump was putting it under as the engine ran. Just a thought....
#24: Re: 1.4hdi throttle when warm issue Author: wobblycat, Location: walesPosted: Mon Aug 24, 2020 11:38 pm ---- Got the problem sorted - it was an ECU update from Peugeot.
Crazy.
Cost me £100 for an ‘inspection’ and then £100 for the update.
But all is working now as it should.
Incase anyone is interested, my throttle is the electric Bosch one part number 0280755078 - very hard to come by on eBay etc (has the letter D on the front - to represent right hand drive, non speed limiting pedal)
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