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Can anyone tell me where thermostate is on 1988 f150 straight 6

Need to know where thermostate is located so I can change it..

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  • 19 Answers

Just follow the upper radiator hose to the housing that it is connected to. Remove the radiator hose, and then the housing itself. The thermostat is under the housing. be sure to remove all the old gasket and install a new one when you put it back together.

Posted on Jul 29, 2013

  • Travis long Jul 29, 2013

    Thank you very much

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Posted on Jan 02, 2017

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SOURCE: Ford F150 4.9 Straight 6

i need a diagram of the firing order for this please

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its by your light switch/ Please rate my response thank you very much

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SOURCE: 1988 ford f150 fuel pump relay location

inner driver side fender well along with the eec relay

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SOURCE: 1988 ford F150 vacuum hoses

Always refer first to the factory vacuum diagram sticker affixed under the hood...

1988 Ford Truck F150 1/2 ton P/U 2WD 4.9L FI 6cyl

674afb5.jpg

Fig. : Vacuum diagram-1987 F-Series, all engines


Hope this solve it (remember comment and rated this).

Posted on Apr 23, 2010

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Related Questions:

1 Answer

Engine size


The straight 6 is a 4.9 liter
the v-8 options are a 5.0 and a 5.8. This should be indicated on the intake plenum and/or on the emissions sticker located under the hood. Also the 8th digit of the vin number will tell you what engine you have.

May 14, 2013 | 1988 Ford F 150

1 Answer

I need to know exactly where the location of the thermostate is in my 1994 mazda MPV. Can anyone help me? I am trying to change it.


Follow the lower coolant line from the radiator to the engine and the thermostat will be under that housing. Hope that helps you.

Aug 05, 2011 | Mazda MPV Cars & Trucks

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Air conditioning not working


put 12v straight to the compressor if the clutch ingages comp is good turn ac on is it stops then you are low on freon jump the short cycle switch & charge the system

Jun 05, 2009 | 1988 Ford F 150

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Serpintine route for a 1990ford


I'm not an expert, but I have a 1990 f150 300 straight 6 cyl. as well and I drew you a simple diagram.


ef75765.jpg hope it helps.

If you know of a fuel tank switch for the dash plz let me know!

May 03, 2009 | 1990 Ford F150

1 Answer

1988 ford f150 running rough


Might want to change o2 sensor's, If they are not sending the right single its tell the computer to dump fuel. 1988 was using a fuel density system.
(1989 came out with Mass air flow system)
Check this
I think it might have a TFI module that's not working right. Located under distributor. Its gray and about 4" long and if equip, you need a 4 or 5.5 mm tool to unbolt it. This was a common thing back in the 80's. Its been so long I can't remember if the 4.9 straight 6 had it or not.
T- Thick
F- Film
I- Ignition module

Apr 24, 2009 | 1988 Ford F 150

1 Answer

My truck


you can find that in a Chilton or Haynes manual, if you don't have one, check your local library they may have one

Apr 01, 2009 | 1988 Ford F 150

2 Answers

1988 ford f150 fuel pump relay location


inner driver side fender well along with the eec relay

Feb 02, 2009 | 1988 Ford F 150

1 Answer

Ford f150 1986


The firing order for the 4.9 L engine is 1-5-3-6-2-4, with the firing order rotation on the distributor cap going clockwise. For the 5.0 & 7.5 L engines, the order is 1-5-4-2-6-3-7-8, and the 5.8 L engine is 1-3-7-2-6-5-4-8. On all three of these engines, the distributor cap firing rotation is counterclockwise. Also, on the six cylinder 4.9 L engine, the cylinders are in a "straight six", with #1 cylinder starting in front, and going in order straight back to #6. The eight cylinder engines' cylinders all fire in order also, (standing in front of the vehicle looking back towards the firewall) with #1 being front on your left and going straight back to #4, and then #5 being at front right, going straight back to #8, with the distributor being front and center. Hope this helps you out.

Aug 13, 2008 | 1986 Ford F150 SuperCab

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