Question about 1990 Ford F150

1 Answer

RPMs go down when I press my breaks

I changed my thermostat and had to move the distributor when I did I set the timing off I know but now when I press my breaks the rpm goes down and sometimes so far my engine shuts off. Could it be a vacume leak or the break booster if so where is the vacume hose and how do I check it out.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,198 Answers

While I was working on my Ranger brakes, the engine would die if I pushed the brake too close to the floor. Once I replaced the leaking wheel cylinders and a bad front hose and the old worn out master cylinder.....and bled the lines real good, the problem went away. Getting the front bleeders loose was a real struggle. With much liquid wrench, vise grips, and careful hammering, they came loose. Cursing helps. The lines won't bleed right if you just loosen the mounting bolts. I put a little grease on the bleeder threads so maybe they won't be stuck next time.

Posted on Nov 24, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert 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 repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

1969 with 351 Windsor stock engine. Once it reaches 1,500 rpms why do the tach & engine jump up and down?


If this is a points type ignition, check for excess play side to side in the distributor shaft, and also for timing chain slack--easily tested by removing dist. cap and rotating engine back and forth with wrench on crank pulley bolt. If rotor doesn't move immediately as crank turns you have loose timing chain.

Oct 02, 2015 | Ford Mustang Cars & Trucks

1 Answer

What causes sudden loss of acceleration with increase in rpms?


if engine is revving and in drive and does'nt move must be a gearbox /drive train problem,is it a manual gearbox ? if it is then i'd say get the clutch changed as pressure plate failure would cause this type of sypmptom let me know how you get on

May 06, 2014 | Subaru Impreza Cars & Trucks

1 Answer

When setting the timing marks together distributor always points to #6 not #1 put new timing chain & gears in but cant get it timed right 5.2


Is it possible to turn the distributor shaft 180 degrees and reinstall the dist ?
I am assuming you have spark at the plugs, just not at the right time ?
If the distributor has not been moved, and the rotor points to the wrong wire, you could have put the cam gear in upside down ?

Jul 01, 2012 | Dodge Cars & Trucks

1 Answer

Accidentally moved distributor position when installing new plug wires. How do you know where it should be?


Well just to clarify, if the rotor moved, you don't need to do anything. Just put the cap back on and reassemble anything that you took apart.
If, however, you had loosened the distributor hold down bolt and the actual distributor itself rotated, you will need to set your ignition timing with a timing light. The setting on your vehicle with a V6 is 10 degrees before top dead center(10 BTDC). If you are standing in front of the vehicle and looking at the engine's timing plate, that would be the mark with the 10 to the LEFT of the 0 (TDC). Hope this helps.

Nov 03, 2010 | 1988 Dodge Dakota

1 Answer

Need the procedure for setting ignition timing on a dodge truck with a 318 motor year is 2001


hook up to timing light, start vehicle. loosen distributor hold down bolt. aim timing light at timing mark. rotate distributor either way untill the proper mark lines up, then tighten hold down clamp, shut off vehicle then unhook timing light. rpms should be at least 650 to 700, for automatic tranny.

Aug 19, 2010 | Dodge Pickup Cars & Trucks

2 Answers

1977 ford f-100, 302 motor, c4 transmission. set the timing


With the vacuum line(s) dis-connected from the distributor and plugged up, the engine timing should be set at 4 degrees before top dead center idling at 650 rpm, and if it has California emissions then the ignition timing should be set at 12 degrees before top dead center while idling at 700 rpm. If the timing specifications listed on the vehicle emission label are different from these specifications then the specifications listed on the emission label are to take precedence.

Use a timing light to check the ignition timing, (and be sure that the timing light is connected to the #1 spark plug wire) and if the ignition timing is not to specifications then loosen the distributor hold down and turn the distributor until the timing marks move into position and are aligned to the timing specification, then tighten down the distributor hold down and then re-check the timing to be certain that the distributor did not move out of timing when the distributor was tightened down, then re-connect the vacuum line(s) to the distributor and re-set the engine idle back to where it was if it had to be changed. Be sure that the timing scale and marker down on the harmonic balancer/crankshaft pulley and the engine block are clean and they will show up well, and you can also mark them with chalk so the engine can be timed easily.

If you connect the vacuum line(s) to the distributor and the engine runs poorly then all of the vacuum line(s) to the distributor will have to be checked and then connected to their proper vacuum source.

If the ignition wires are leaking secondary voltage you might get a good secondary voltage shock if you touch the distributor to turn it. Let me know if you need help connecting and using a timing light, or if you require any further assistance.

Here is a firing order diagram to help assist you.


0f87d00.gif

Jun 17, 2010 | Ford F-100 Cars & Trucks

1 Answer

Car is out of time....cause trying to change the distributor cab, by mistake the crantshaf was moved and now the timing in the chevy is out of line


If you only replaced the distributor cap and did not remove the distributor or loosen the holdown bolt that keeps it from moving, turning the engine won't have any effect on the timing.. Chances are that you put the wires back on the cap in the wrong order or began at the wrong starting point. As long as the distributor has not been removed from the engine, to find #1, turn the crank to 0 and look at the rotor. If it points to the firewall, turn the engine one more time 'till it points to the front. Wherever it points is #1.If you loosened the distributor and turned it, turn the housing 'till the closest wire tower aligns with the rotor, then lock it down
If it is a v8 engine, the order is 18436572 in the direction the rotor turns when cranking or running. You can look up the order for v6 engines in any haynes or chilton manual.
To set the timing without a timing light, start the engine, put the transmission in drive and keep your foot on the brake to keep the vehicle from moving, then apply more gas...at some point the engine will begin to rattle (detonate) if the timing is too far advanced. You need to keep turning the distributor and repeating the process till it detonates, then turn the distributor back about 1/4". That should give you a good "ballpark" timing setting 'till you can get someone to do it correctly. (process is called power timing) When finished, tighten the distributor down so it does not change while driving. NOTE: When power timing, allways have room in front of the vehicle so you won't crash into anything, and NEVER permit anyone to stand in front of it.

May 03, 2010 | 1995 Chevrolet Caprice Classic

1 Answer

No oil pressure and a knocking that got


Sounds like the oil pump intermediate shaft might have slipped out of place when the distributor was removed and replaced. The intermediate shaft is held to the oil pump by a nylon sleeve that can and sometimes does break, which will allow it to slip out of place. Pull the distributor back out and look down the hole with a flashlight, you should see the top of the shaft, it looks like the head of a regular flat tip screw, if you do not see this the shaft is out of place and the only fix is to remove the oil pan and reinstall it. As far as engine damage, if you only ran the engine for a short time and at low rpms you might be alright, if you drove it down the road or ran it at high rpms then there is probably damage to the bearings, and the knock will not go away.

Apr 08, 2010 | 1990 Chevrolet Suburban

3 Answers

How do i set the distributor timing?


Hi stevens-jr,
Make sure that the crank shaft and the cam are both on their respective timing marks....Retention the chain....Once you've done that, check again to make sure that they are still synchronised....If your dealing with coil ignition it's fixed and will be automatically set once the valve timing is set....Any minor adjustments must be made electronically.... If you have a distributor, follow below:-

Once you're sure of the valve timing, set the engine to TDC with number one piston, on the ignition or power stroke... (inlet and exhaust valves both closed) and fit the distributor, so that the rotor is facing the place on distributor where number one plug is situated on the cap....If need be, fit the cap to see the relative position of number one plug....That should give you the relative firing point....Set the distributor by turning it, so that the edge is just stepped away from the pick up coil....the spark takes place as the rotor moves away and breaks the magnetic field between the two....This should happen at about eight degrees before TDC....Once the engine has started, set it with a strobe light...

Best of luck

Regards Johngee10

Aug 31, 2008 | 1991 Chevrolet C1500

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

109 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

70346 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Ron Lankford

Level 3 Expert

5386 Answers

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

Answer questions

Manuals & User Guides

Loading...