Cvh 1.6T difficulty starting when warm
22-12-2020, 05:03 AM
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Cvh 1.6T difficulty starting when warm
Hello all,
I have a ford fiesta mk2 with a swapped cvh 1.6T in it. She goes like the wind but when i try to start it when she's warm it takes a full minute for my poor starter motor to start her up again.
I was thinking it maybe has something to do with the fuel system, any gueses? Does anybody else have this problem and maybe knows a solution?
Thanks in advance.
I have a ford fiesta mk2 with a swapped cvh 1.6T in it. She goes like the wind but when i try to start it when she's warm it takes a full minute for my poor starter motor to start her up again.
I was thinking it maybe has something to do with the fuel system, any gueses? Does anybody else have this problem and maybe knows a solution?
Thanks in advance.
22-12-2020, 05:37 AM
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22-12-2020, 11:10 AM
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22-12-2020, 11:41 AM
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It's an Escort S2 RST MFI (KE-Jetronic) engine. Most common reason for an engine not starting when hot (but starting fine when cold AND runs fine when hot!?!?) are vapour bubbles in the fuel lines.
Injectors suffer from wear. It's always a good idea to change them. Plus leaking injectors are one cause for vapour bubbles. They're not that expensive. (About 30-40 Euros each, buy them as aftermarket parts, not directly @Ford)
There's a one-way valve on top of the fuel pump. These might stop working after all these years. It sits on the pressure side of the pump. When you take of the hoses and connectors, you can see the holes an a little spring inside.
You can't get these valves @Ford, but try at a Bosch Service Station. These engines/fuel pumps were used in many cars back in the days (Audi, VW, Benz, Porsche, Ferrari) and for many manufacturers these valves cost less than 10 Euros. Don't try to get one for the Escort RST as even Bosch probably won't sell the valves as single item.
EDIT: This is how the one-way valve looks like:
http://www.kurth-classics.de/wp-cont...e/dsc_2213.jpg
Depending on which part you get, you might have to change the hose connectors. When using different fuel lines, use high pressure ones for at least 10 bar fuel pressure!
Injectors suffer from wear. It's always a good idea to change them. Plus leaking injectors are one cause for vapour bubbles. They're not that expensive. (About 30-40 Euros each, buy them as aftermarket parts, not directly @Ford)
There's a one-way valve on top of the fuel pump. These might stop working after all these years. It sits on the pressure side of the pump. When you take of the hoses and connectors, you can see the holes an a little spring inside.
You can't get these valves @Ford, but try at a Bosch Service Station. These engines/fuel pumps were used in many cars back in the days (Audi, VW, Benz, Porsche, Ferrari) and for many manufacturers these valves cost less than 10 Euros. Don't try to get one for the Escort RST as even Bosch probably won't sell the valves as single item.
EDIT: This is how the one-way valve looks like:
http://www.kurth-classics.de/wp-cont...e/dsc_2213.jpg
Depending on which part you get, you might have to change the hose connectors. When using different fuel lines, use high pressure ones for at least 10 bar fuel pressure!
Last edited by XR2; 22-12-2020 at 11:45 AM.
22-12-2020, 01:26 PM
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It's an Escort S2 RST MFI (KE-Jetronic) engine. Most common reason for an engine not starting when hot (but starting fine when cold AND runs fine when hot!?!?) are vapour bubbles in the fuel lines.
Injectors suffer from wear. It's always a good idea to change them. Plus leaking injectors are one cause for vapour bubbles. They're not that expensive. (About 30-40 Euros each, buy them as aftermarket parts, not directly @Ford)
There's a one-way valve on top of the fuel pump. These might stop working after all these years. It sits on the pressure side of the pump. When you take of the hoses and connectors, you can see the holes an a little spring inside.
You can't get these valves @Ford, but try at a Bosch Service Station. These engines/fuel pumps were used in many cars back in the days (Audi, VW, Benz, Porsche, Ferrari) and for many manufacturers these valves cost less than 10 Euros. Don't try to get one for the Escort RST as even Bosch probably won't sell the valves as single item.
EDIT: This is how the one-way valve looks like:
http://www.kurth-classics.de/wp-cont...e/dsc_2213.jpg
Depending on which part you get, you might have to change the hose connectors. When using different fuel lines, use high pressure ones for at least 10 bar fuel pressure!
Injectors suffer from wear. It's always a good idea to change them. Plus leaking injectors are one cause for vapour bubbles. They're not that expensive. (About 30-40 Euros each, buy them as aftermarket parts, not directly @Ford)
There's a one-way valve on top of the fuel pump. These might stop working after all these years. It sits on the pressure side of the pump. When you take of the hoses and connectors, you can see the holes an a little spring inside.
You can't get these valves @Ford, but try at a Bosch Service Station. These engines/fuel pumps were used in many cars back in the days (Audi, VW, Benz, Porsche, Ferrari) and for many manufacturers these valves cost less than 10 Euros. Don't try to get one for the Escort RST as even Bosch probably won't sell the valves as single item.
EDIT: This is how the one-way valve looks like:
http://www.kurth-classics.de/wp-cont...e/dsc_2213.jpg
Depending on which part you get, you might have to change the hose connectors. When using different fuel lines, use high pressure ones for at least 10 bar fuel pressure!
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22-12-2020, 06:03 PM
#8
Advanced PassionFord User
You're welcome. It's just the usual problems K-Jetronic suffers from now and then. Generations of Golf GTI drivers faced the same problems. 
Let's hope this will solve your problems. Tracking down issues with the metering unit or the ECU on a ERST engine is much more complicated.
Let's hope this will solve your problems. Tracking down issues with the metering unit or the ECU on a ERST engine is much more complicated.
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