Question about 1990 Ford F150

1 Answer

******* gas What makes my 1990 Ford Custom 6 Cylinder 4 w/d so ******* gas I know other people that have the same truck as mine and is a lot better on gas then mine am taking something like 6 / 7 mille a gallon

Posted by on


1 Answer

If it has a history of poor gas mileage I'd check the axle ratio. There is a two digit code on the driver side door frame which designates the lgear ratio. For example and 18 is a 3.08, a 19 is a 3.55. I found these once on the net. The higher the ratio the poorer the gas milage but you should have more power.
If this developed recently I'd check the air filter. If it smokes you may have worn rings. Your temp sensor to the computer may be sending a "cold" temp to enrich the mixture. Your brakes may be partially engaged, especially the parking brake which may bind due to corrosion in the cable. If it seems to run well but lacks power you may have a clogged catalytic converter.
Hope this getes you starteed.

Posted on Jul 29, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Will a motor out of a 1986 interchange with my 1990 ford ranger

Should bolt in, depending on size of the motor if it's the same 3.8, or 4.0 (6 cylinder) or four cylinder. The problem with using a different size is wire harness, exhaust and the peripherals. But 86 to 90 didn't change very much it's after 93 that Ford made a lot of changes. Hope this helps...

Nov 07, 2015 | Ford Cars & Trucks

1 Answer

Im looking for the fire order for an 88 ford pick up 6 cylinder

Hello my name is brad,here is your answer to fireing order is 1-5-3-6-2-4. at the distributor cap the clip out away from engine right of clip is # 1 left of clip is# 5

Sep 18, 2011 | 1990 Ford Ranger SuperCab

2 Answers

I have a 2002 f-150 4x4 lariat. The computer says number four cylinder misfire, I need to know where the number four cylinder is located

1-2-3-4 Pass Side

5-6-7-8- Driver Side

1&5 at front of engine

COP Coil is about $60.00 at
auto parts store

That only will work, if you got
A PO304 Code and no other
PO cylinder codes

Spark Plugs--replace every 70,000 miles
O2 Sensors--replace front 2 at 100,000 miles
Clean MAF and Throttle Plate

Feb 21, 2011 | Ford F-150 Cars & Trucks

1 Answer

Toyota4runner SR5 - zero compression in one

sounds like a burnt valve or a flat camshaft or a broken rocker arm .is it a 6 cylinder or a 4 cylinder the cost will depend on that

May 26, 2010 | 1990 Toyota 4Runner

1 Answer

Can i add an extra gas tank to my 1998 Ford Ranger. (xltl, 4.0 6 cylinder.)If so where can one be purchased.

The only way I can think of to add a tank is to add a fuel cell in the bed. Or have one custom made to go underneath. If you add a fuel cell in the bed, you can just use it to fill your other tank when its low with an electric valve. Hooking the tank to a tank switch would be a lot of work since the fuel pump is in the tank.

Apr 10, 2010 | 2000 Ford Ranger SuperCab

1 Answer

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

2 Answers

Fuel problem?

Sounds like a clog somewhere.

Jul 21, 2008 | 1990 Ford F150

1 Answer

1990 ford custom F150 6 cylinder automatic

ok what you want to do is take out your battery bring it to an autozone theyll put a load on it and tell you if you have a bad cell in your battery,and have to replace it if its ok its the starter dragging and need a new starter

Jul 08, 2008 | 1990 Ford F150

Not finding what you are looking for?
1990 Ford F150 Logo

Related Topics:

162 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers


Level 3 Expert

5622 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides