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V8-7.5L

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Engine cranks but won't start

The first thing you need to do is to disconnect and clean battery clamps and posts. Then check engine main ground cable to see if you are losing ground or connection through battery clamps. You are getting big voltage drop...

1997 ford f350 7.5 l engine cranks but no start.Has spark,good compression,fuel,tried start fluid,removed oxy sensor.Any other ide

Hi Dan. Thanks for contacting us today. I'm kind of curious as to why you'd remove the O2 sensors - as they are vital for relaying data to the ECU in order to create the right air to fuel mixture....

Need wire connection details for 73 F100 ignition switch -Black, Yellow, Pink, Red w/Blue, & two Red w/Green on one terminal

Hi there. Unfortunately, we are unable to attach images or files to this Q & A section, so we're not able to assist you in this manner. I would suggest searching online for a wiring schematic for your 73 Ford...

Why is my truck is leaking transmission fluid?

Hi there. Check the location of the transmission fluid leak on the case to determine what needs replaced. There are 5 locations for the transmission to leak that are common. Locations of a leak The input shaft seal The rubber...

Fast Vibration that increases with speed, and can be felt best through the steering wheel

Usually, vibration in the steering wheel is due to dynamic imbalance of the wheel/tire assembly and/or a rim is bent. Wireless chassis ears can be helpful in the diagnostic as they can pinpoint if one side, versus the other, is...

Battery voltage is low.

Hello. If the battery voltage reads low on the gauge then that is a sign that the charging system is not functioning correctly. If the alternator is brand new then there is little chance that it is the source of...

My vacuum pump seems to be leaking water

Hi and thanks for contacting YourMechanic. Vacuum pumps are required to have oil in them for lubrication. If the pump is leaking water, then either the oil is the wrong type and is leaking out, or the pump has a...

Gas filler neck rejects fuel immediately.

Your fuel neck has a restriction in the hose. The filler neck (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-fuel-filler-neck) has a big hose on the out side and a smaller hose on the inside. If someone tried to siphon gas from your truck they may have...

Carburetor burning rich

Your carburetor may just need to be setup again, or possibly rebuilt. Your carburetor is probably a Rochester Quadrajet. The plastic float Rochester uses can crack, and therefore, never rise with the fuel level in the bowl, causing too much...

Engine squealing when idling

Hi there. A squealing noise is a common sign that the rotating parts such as your belts are slipping on their pulleys. A worn belt will make this noise due to the loss of tension and gripping ability of the...

Engine clicking and shaking

Hello. The symptoms you describe can be caused by a few different things. A few possibilities are an exhaust leak, or some sort of engine performance issue, such as a misfire. If the noise appears to be coming from the...

1987 Ford e350 rv cranks over but wont start and have tried everything and checked most reasons why it may not please help

At the age of your car it could be about anything, but the good news is that the engine in your truck is a pretty sturdy unit so I doubt you have major engine problems at just 96,K miles. A...

I installed a new fuel pump, but the line from the pump to the carb is leaking at the flare fitting on the pump

Hello, thank you for writing in. The hardest part is done. Locating and noticing the leak is typically where people fail to follow through with their repairs. The flare on the line was likely bent or damaged. They are very...

How do you avoid the upper and lower A arm bushings from melting on a 1970 GS 455?

Hi there - yes, this is a very large engine, in a moderately-sized place, with lots of heat transfer issues! As you suggest, heat shields, or wrapping the exhaust manifold (headers?) with "heat wrap" to keep the heat inside the...

Electrical wiring issue with the dash lights.

Check the lights on the dash and look for the wiring. Follow the wires to where they hook up to and check that component to see if it's working. Most dash lights are hooked into the light switch and on...

My car backfires at 50 mph.

Hi there. There is a timing problem with your engine. Check the vacuum advance to see if its advancing when the engine is at a higher rpm. Also check the spark plugs (https://www.yourmechanic.com/services/spark-plugs-replacement) and wires (https://www.yourmechanic.com/services/ignition-cable-spark-plug-wires-replacement) for if they are...

I am swapping transmissions

You may need to look at how the 1996 bolted up and how the 1988 bolted up. If the 1996 bolts up the same as the 1988 did then use the newer design. You may find they are close to...

No current to fuel pump

First, I would check the inertia switch. This switch opens on perceived impact and prevents power from getting to the fuel pump. There should be continuity across the switch at all times. If the switch is good, I would check...

Wire came off of starter

Hi, if this is a large diameter wire like a battery cable then it may be the cable to the starter terminal. If it is a smaller wire, it may be a memory wire for the engine controls and things...

My truck won't stay started

Hi there. It sounds as if you are experiencing an obstruction in the fuel delivery system. A loss in compression after your vehicle has warmed up can also cause this issue. I'd strongly suggest having a mechanic, such as one...

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