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 Posted: Sun Jan 06, 2013 9:13 pm |
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Joined: Jan 06, 2013
Posts: 8
Trade Rating: 0
Location: Lancaster, Lancashire
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Kindibarrettt: saying I did all that and it still over heats, what else could it be? As I am unable to idle under 1700rpm this just 1% open on throttle or just normal idle. I'm thinking more along the lines of a senser or fuelling problem as I just remembered and forgot to say when starting this post was that I am only getting round 250 miles to a full tank, that's £60 of fuel.
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Posted: Mon Jan 07, 2013 6:11 am |
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Joined: Apr 19, 2012
Posts: 529
Trade Rating: 0
Location: darlington
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The reason i asked about grill and filter is because OP mentions overheat then cooling downhill which indicates a possible airflow problem...like a blockage or old filter...
However my priority would be a headgasket check soon as...get them to do the engine gasses in the coolant check..otherwise known as the sniff test...this will tell u 100%either way and is £30or less...then all being well at least this is eliminated...
Its just far too weird for a simple problem...unfortunately id prepare for the worst...but a second hand engine is cheaper than a head job on these...
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Posted: Mon Jan 07, 2013 6:32 am |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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Your latest update has made me think you may have a leaking injector. The excess fuel from that injector is then making the rest of the sensors think you are over fueling so leaning off the fuel supply and lean running causing an overheat. If this is what is happening then be careful from there to engine siezure or a holed piston is only a small step.
If you can't idle (why didn't you say that before) I would also check the whole of the air intake system for air leaks. That is both loose pipes and split or missing ones. Inability to control idle is usually an air intake leak or failed ICV. An air leak would also have it running lean and over heating.
Before removing injectors for leak testing I would still get the "sniff" test done on the coolant just in case it is the beginning of headgasket failure.
I don't know if Peugeot suffer from it (Alfas do) but some water pumps have a plastic impeller that becomes loose on the pump drive shaft. That isn't a problem at low speed but at sustained high speeds the water doesn't circulate fast enough.
It is really starting to look like you are about to get into removing engine components for test purposes. I don't know what readings you can get from the ECU via PP but most ECU will give fuel delivery to each seprate injector (while it won't show leakage it could highlight a leaning off of mixture to the other 3 injectors) so perhaps a session with a knowledgeable forum user and PP while driving is in order.
If you have put a new thermostat in then that should eliminate that - though I am still suspicious.
Failing that it is possibly a trip to a garage for ECU readings and 4 gas exhaust analyser to see where the fault is.
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| Morris 1000, Austin 1100, Escort Mk2, Fiat Mirafiori, Alfa 33, Alfa GT Junior, Alfasud, Alfetta GTV (2x), Alfa 164 3.0 V6, Alfa 164 2.0, Alfa 75 V6, Alfa 156 2.4 (diesel remapped 200bhp), Alfa 147 GTA (3.6 295bhp), Alfa 159 (diesel remapped 245bhp 300ft.lbs @ 2500rpm)
Why isn't my daughter an Alfaholic? | |
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Last edited by kandlbarrett on Mon Jan 07, 2013 5:16 pm; edited 2 times in total
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Posted: Mon Jan 07, 2013 6:37 am |
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Joined: Jan 29, 2011
Posts: 6526
Trade Rating: +10
Location: Westhoughton, Lancashire
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| bezford wrote: |
The reason i asked about grill and filter is because OP mentions overheat then cooling downhill which indicates a possible airflow problem...like a blockage or old filter...
However my priority would be a headgasket check soon as...get them to do the engine gasses in the coolant check..otherwise known as the sniff test...this will tell u 100%either way and is £30or less...then all being well at least this is eliminated...
Its just far too weird for a simple problem...unfortunately id prepare for the worst...but a second hand engine is cheaper than a head job on these... |
But the air filter has nothing to do with the cooling of the car, although a blocked air filter can cause running problems.
The grill I can understand as changing this to an aftermarket/homemade one could restrict the air flow onto the radiator. Do London taxis still have the mat that drops down over the front grill to increase the engine temperature or have all those now been replaced with modern black cabs?
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Posted: Mon Jan 07, 2013 10:50 am |
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Joined: Apr 19, 2012
Posts: 529
Trade Rating: 0
Location: darlington
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The engine needs air to cool it and to mix with the fuel so if its starved with a blocked air filter it may overheat but will certainly run like a bag of s**t...
The fact that the car will cool down going downhill could point to a grill blockage or similar as the air circulation will improve going downhill with more air potential coming from under the cars front bumper.engine compartment...but he is letting off the throttle on the hill so both factors contribute to the ease off in temprature...
However i had these symptoms and it was the head gasket blown so check this a.s.a.p.
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