Mondeo mk3 1.8 Duratec petrol lack of power when hot
15-09-2013, 10:23 PM
#1
PassionFord Post Whore!!
Thread Starter
Mondeo mk3 1.8 Duratec petrol lack of power when hot
Interesting one this. First job Friday morning, customer had been driving around since 6:30am 
to get car hot enough to demonstrate fault.
Petrol Mondeos don't seem to be as much bother as the TDCIs!
Apparently after being driven for over an hour, car loses power and the hotter it gets the worse it gets. Went out with customer, and sure enough after a few miles, car holds back and if kept on full throttle car goes even slower.
Stopped on side of road, got customer to rev car,wouldn't rev over 4k, sounded like it had anti-lag and exhaust was 'hissing' as if restricted.....
Went back to garage, no codes in ECU, car had been elsewhere and had new cat and EGR valve, but when these didn't fix it they had ran out of ideas and advised to go to main dealer.
Got car to fault in workshop, again sounded restricted through exhaust, so undone exhaust after cat, still the same, undone exhaust before cat, still the same but LOUD.
Hmmm...
As ever went back to basics. Fuel pressure gauge on the rail (returnless system, FPR part of in-tank pump), started up, over 3.5bar, but went down to 2.5bar when revved up, but not faulting.
Left running a little longer, car started faulting and fuel pressure went down to 1bar when revving. (Should be 3.8bar and maintain it when running) filter is recent and OK.
Awaiting authority to fit new in-tank pump.
to get car hot enough to demonstrate fault.Petrol Mondeos don't seem to be as much bother as the TDCIs!
Apparently after being driven for over an hour, car loses power and the hotter it gets the worse it gets. Went out with customer, and sure enough after a few miles, car holds back and if kept on full throttle car goes even slower.
Stopped on side of road, got customer to rev car,wouldn't rev over 4k, sounded like it had anti-lag
and exhaust was 'hissing' as if restricted.....Went back to garage, no codes in ECU, car had been elsewhere and had new cat and EGR valve, but when these didn't fix it they had ran out of ideas and advised to go to main dealer.
Got car to fault in workshop, again sounded restricted through exhaust, so undone exhaust after cat, still the same, undone exhaust before cat, still the same but LOUD.
Hmmm...
As ever went back to basics. Fuel pressure gauge on the rail (returnless system, FPR part of in-tank pump), started up, over 3.5bar, but went down to 2.5bar when revved up, but not faulting.
Left running a little longer, car started faulting and fuel pressure went down to 1bar when revving. (Should be 3.8bar and maintain it when running) filter is recent and OK.
Awaiting authority to fit new in-tank pump.
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17-09-2013, 08:58 PM
#8
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Hahahahahah!!!!!! Shocking! I bet the guy isnt happy after spending money for bits it didnt need! As you said the Mondeo petrol is fairly good. Ive only come across one bad one and that was one of the first on an X plate and that had managed to spin the bottom crank sprocket.
25-09-2013, 08:24 PM
#9
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Sounds like mine, currently doing the same, and thought it may have been a collapsed cat. But disconnected it before the cat and still the same but by Jesus, it was noisy.
Today while driving with the radio off, I could hear the fuel pump making noises. Do you think a new pump would sort this??
Today while driving with the radio off, I could hear the fuel pump making noises. Do you think a new pump would sort this??
25-09-2013, 09:06 PM
#10
PassionFord Post Whore!!
Thread Starter
Really need to get a fuel pressure test done to make sure, as a pump from Ford isn't cheap and it's a tank off job to fit too.
Fuel filter been changed recently?
Fuel filter been changed recently?
14-10-2016, 06:35 PM
#11
Interesting one this. First job Friday morning, customer had been driving around since 6:30am to get car hot enough to demonstrate fault.
Petrol Mondeos don't seem to be as much bother as the TDCIs!
Apparently after being driven for over an hour, car loses power and the hotter it gets the worse it gets. Went out with customer, and sure enough after a few miles, car holds back and if kept on full throttle car goes even slower.
Stopped on side of road, got customer to rev car,wouldn't rev over 4k, sounded like it had anti-lag and exhaust was 'hissing' as if restricted.....
Went back to garage, no codes in ECU, car had been elsewhere and had new cat and EGR valve, but when these didn't fix it they had ran out of ideas and advised to go to main dealer.
Got car to fault in workshop, again sounded restricted through exhaust, so undone exhaust after cat, still the same, undone exhaust before cat, still the same but LOUD.
Hmmm...
As ever went back to basics. Fuel pressure gauge on the rail (returnless system, FPR part of in-tank pump), started up, over 3.5bar, but went down to 2.5bar when revved up, but not faulting.
Left running a little longer, car started faulting and fuel pressure went down to 1bar when revving. (Should be 3.8bar and maintain it when running) filter is recent and OK.
Awaiting authority to fit new in-tank pump.
to get car hot enough to demonstrate fault.Petrol Mondeos don't seem to be as much bother as the TDCIs!
Apparently after being driven for over an hour, car loses power and the hotter it gets the worse it gets. Went out with customer, and sure enough after a few miles, car holds back and if kept on full throttle car goes even slower.
Stopped on side of road, got customer to rev car,wouldn't rev over 4k, sounded like it had anti-lag
and exhaust was 'hissing' as if restricted.....Went back to garage, no codes in ECU, car had been elsewhere and had new cat and EGR valve, but when these didn't fix it they had ran out of ideas and advised to go to main dealer.
Got car to fault in workshop, again sounded restricted through exhaust, so undone exhaust after cat, still the same, undone exhaust before cat, still the same but LOUD.
Hmmm...
As ever went back to basics. Fuel pressure gauge on the rail (returnless system, FPR part of in-tank pump), started up, over 3.5bar, but went down to 2.5bar when revved up, but not faulting.
Left running a little longer, car started faulting and fuel pressure went down to 1bar when revving. (Should be 3.8bar and maintain it when running) filter is recent and OK.
Awaiting authority to fit new in-tank pump.
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