Unusual issue with my car

[Tomr10]

2005 Toyota Corolla 1.4 diesel realy hard to start when hot no waring lights. Then on occasion the warning light comes on but it's easy to start problem is the car is down on a bit of power.

It had a new intercoler fitted by a garage due to a hole they also cleared the endings fault for this is it possible they changed another setting by mistake.

So many things that can affect it not sure where to start without throwing parts at it

 

[Brisel]

What light comes on? It has thrown a fault code and gone into a reduced power mode. Plug the diagnostic back in and see what comes up. Also do this when starting from hot.

 

[Tomr10]

Engine warning light I have been considering a code reader but theres so many out there not sure which is best did think about getting the rac to come out as a free code read

 

[TheTallGuy]

Engine warning light I have been considering a code reader but theres so many out there not sure which is best did think about getting the rac to come out as a free code read

If you have a smartphone then just get a Bluetooth device (plenty on amazon & fleabay) & use Torque or inCarDoc.

 

[Scribus]

Air mass sensor could be one culprit, hot air is less dense but that's only the wildest of guesses

On a similar subject I have a Kia Sportage diesel that keeps slipping in and out of limp mode with no warning light coming on. Have had it plugged in and all faults cleared etc several times, but it still does it. The only pattern I can see is that it's more likely to happen on cold days.

 

[astra]

If you have a smartphone then just get a Bluetooth device (plenty on amazon & fleabay) & use Torque or inCarDoc.

Any link or recommendation to one of those? Please and thanks...

 

[Timbo]

Common rail? One injector leaking back or hp pump getting weak.

 

[TheTallGuy]

Any link or recommendation to one of those? Please and thanks...

https://www.amazon.co.uk/Torque-Pro...ooth+obd2&qid=1579012856&sprefix=Elm32&sr=8-4

Looks to be the same as what I bought a couple of years ago.

 

[agrimax]

It could be worth replacing the crank position sensor.........

 

[agrimax]

It could be worth replacing the crank position sensor.........

 

[f0ster]

from autodata it should be common rail, start with a leak off test on the injectors. with common rail if the min fuel pressure is not reached injection is disabled, as previously mentioned an injector leaking internally via the leak off rail can cause the fuel pressure to be dumped.

 

[Tomr10]

I have cleaned all the engine to look for a leek. I did run it on kerosene for a few days about 2 months ago to try and clean the injectors

 

[JeepJeep]

SCV .. Suction control valve could be.

 

[Tomr10]

Think I'm going to get that reader so many things it can be

 

[f0ster]

the injectors might be leaking internally, the high pressure will be escaping via the leak off rail so you will not see anything because it will be going back to the tank via the leak off pipe. you have to remove the leak off pipes on the injectors and fit a small container to each injector leak off so as to capture any fuel that is dumped, you then crank it over for a while and compare each container, you always get some leak off even with new injectors, but if you get too much then the fuel rail cannot reach the min fuel pressure to allow injection, also if it is cranking over to slowly this will also cause low fuel pressure. such as a lazy battery or starter. kerosene is not recommended to be used on injection systems due to the very close working tolerances of the internal parts of the injectors and the high pressure pump. it can cause the internal parts to score and wear, you must add a lubricant to it, such as 2 stroke oil.

 

[Tomr10]

kerosene was because I thought I had a blocked injector as I found dirt that made it through the filter.
It turns over fast same as before I had the issue. I'm wondering if I have damaged an injector will try what you suggested

 

[f0ster]

kerosene has no lubricant in it, I would still try the leak off test, the fuel pressure can only escape via the leak off rail. unless the pump is just generating enough pressure, you are looking at pressures of over 1000 bar with common rail.

 

[Timbo]

I have cleaned all the engine to look for a leek. I did run it on kerosene for a few days about 2 months ago to try and clean the injectors

Not wise. Do a leak off test on the injectors hot and cold, if none are leaking back excessively - HP pump is weak.

 

[TripleSix]

Needs diagnosing properly.

Could be crank sensor
Cam sensor
Temperature sensor

 

[Tomr10]

I dont have a leak off tester so popped off the tops and tried to look at the difference the one on the right seemed to squird fuel out. When I tried it with engine hot was harder to start but didn't seem to squirt