engine temperature high

URGENT ASSISTANCE REQUIRED!

Moderator: Moderators

Post Reply
mihalyn90
Project Petrol Head!
Project Petrol Head!
Posts: 518
Joined: Tue Nov 24, 2015 10:12 am
Model: 1.7

engine temperature high

Post by mihalyn90 » Mon Jul 01, 2019 5:31 pm

So let me explain...
when sitting, a/c on, everytime my ac pump kicks in the engine has a moment where the RPM drops, sometimes stall...

now, the temperature got high with the AC, so i stopped the ac... my fan stopped too...
if i turn AC on, fan turns on, but not for long... and when it wants to turn to high speed, the rpm drops and the engine kinda wants to stall...

no idea what to check so...
where is the temp sensor? if i understand if i put the key to position 2 and i remove the plug, the fan should kick in, even if the car is not running?

where is the fan low speed relay
where is the fan high speed relay
how to check what is faulty?
0 x
Ford Puma 1998 - 1.7L

Magnaflow Core Competition backbox + TIP
Bilstein B8/B6 30mm drop
Xplod 1100W woofer
Complete rebuild HERE

grogee
Adolescent
Adolescent
Posts: 170
Joined: Fri Jan 18, 2019 2:06 pm
Model: 1.7

engine temperature high

Post by grogee » Mon Jul 01, 2019 5:41 pm

I'd guess fan relays are one unit. I'd also bet they are in engine bay fuse box.

A.C. should operate fan by default even if engine is cold, to draw air through condenser.

It sounds like the stall isn't being caused by the A.C. - I would guess air leak. Also the overheat: could be dodgy temp sensor in cyl head, could be stuck thermostat (although they usually fail open). Most likely sludged up radiator. You could try reverse flushing it with a hosepipe.

All guesswork but my two pence worth. Keep us posted if you discover anything.
0 x

mihalyn90
Project Petrol Head!
Project Petrol Head!
Posts: 518
Joined: Tue Nov 24, 2015 10:12 am
Model: 1.7

engine temperature high

Post by mihalyn90 » Mon Jul 01, 2019 5:45 pm

the puma has two relays, k45 and k46 as i see :)
air leak? dont know
thermostat kinda new, max 1 year top
0 x
Ford Puma 1998 - 1.7L

Magnaflow Core Competition backbox + TIP
Bilstein B8/B6 30mm drop
Xplod 1100W woofer
Complete rebuild HERE

mihalyn90
Project Petrol Head!
Project Petrol Head!
Posts: 518
Joined: Tue Nov 24, 2015 10:12 am
Model: 1.7

engine temperature high

Post by mihalyn90 » Mon Jul 01, 2019 7:02 pm

ok the relays are fine, fuses are fine... when in low temp the fan is spinning needle on the center... ac on, high speed kicks in... little knocking noise... when high speed wants to knock in, it fails, draws so much current it almost stalls the engine... so i am looking for a new fan... lovely :) thanks
0 x
Ford Puma 1998 - 1.7L

Magnaflow Core Competition backbox + TIP
Bilstein B8/B6 30mm drop
Xplod 1100W woofer
Complete rebuild HERE

grogee
Adolescent
Adolescent
Posts: 170
Joined: Fri Jan 18, 2019 2:06 pm
Model: 1.7

engine temperature high

Post by grogee » Tue Jul 02, 2019 10:32 am

Nice one... should be a cheap fix, no? Assuming you're going for 2nd hand parts
0 x

mihalyn90
Project Petrol Head!
Project Petrol Head!
Posts: 518
Joined: Tue Nov 24, 2015 10:12 am
Model: 1.7

engine temperature high

Post by mihalyn90 » Tue Jul 02, 2019 12:49 pm

It's 50 euro a new fan... Why should I get a second hand one?
0 x
Ford Puma 1998 - 1.7L

Magnaflow Core Competition backbox + TIP
Bilstein B8/B6 30mm drop
Xplod 1100W woofer
Complete rebuild HERE

CherryVimto
Guru!
Guru!
Posts: 2016
Joined: Sun Jul 28, 2013 12:21 pm
Model: Other
Location: Hampshire

engine temperature high

Post by CherryVimto » Wed Jul 03, 2019 10:12 am

When the fan starts on high speed there is a sudden demand on the electrical system which makes the engine revs drop. At this point the ECU should compensate by adjusting the timing/fueling to bring the revs back up to normal.

I would probably get the battery and alternator checked/load tested as a precaution.

As for the high coolant temps.... really if the fan is on high speed the coolant should get cooler (as long as it is hot enough for the thermostat to be open).

Once the engine is hot, turn it off and check all of the coolant hoses and across the radiator to see if everything is hot. If there are any areas that are only warm you may have a blockage/restriction.
0 x

mihalyn90
Project Petrol Head!
Project Petrol Head!
Posts: 518
Joined: Tue Nov 24, 2015 10:12 am
Model: 1.7

engine temperature high

Post by mihalyn90 » Wed Jul 03, 2019 1:43 pm

the drop is ok to be there, but not to stall the engine. also when the fan is running a clicking noise can be heard from inside... so for me it's the fan dying... a/c works, engine temp is ok at higher speed... this happens in the city and only when the fan wants to start or when it wants to kick in in high speed... so i am 100% sure it's the bearing
0 x
Ford Puma 1998 - 1.7L

Magnaflow Core Competition backbox + TIP
Bilstein B8/B6 30mm drop
Xplod 1100W woofer
Complete rebuild HERE

mihalyn90
Project Petrol Head!
Project Petrol Head!
Posts: 518
Joined: Tue Nov 24, 2015 10:12 am
Model: 1.7

engine temperature high

Post by mihalyn90 » Sun Jul 07, 2019 11:51 pm

sorted... changed the radiator fan :) all good now
1 x
Ford Puma 1998 - 1.7L

Magnaflow Core Competition backbox + TIP
Bilstein B8/B6 30mm drop
Xplod 1100W woofer
Complete rebuild HERE

CherryVimto
Guru!
Guru!
Posts: 2016
Joined: Sun Jul 28, 2013 12:21 pm
Model: Other
Location: Hampshire

engine temperature high

Post by CherryVimto » Mon Jul 08, 2019 9:34 am

Excellent, that's good news!
0 x

Post Reply

Return to “HELP ME!”