Q: Truck is missing only when it is in gear

asked by on

A couple weeks ago my truck started randomly missing while driving then gradually got worse till it was constantly missing but only while in gear.It runs fine while in park.I replaced plugs,wires,and coil packs about a year ago.Yesterday I changed the fuel filter,cleaned the MAF sensor and checked all vacuum lines for a leak and it is still doing the same thing.The check engine light is not on or flashing and it isn't throwing any codes on a scanner.What am I missing here?I don't understand what else could cause it to do this.

My car has 161000 miles.
My car has an automatic transmission.

Hi there, thanks for writing in.

If this problem only happens when you’re in gear and accelerating, its very possible that it could have a transmission problem that causing a hesitation. I have seen issues like this before. It’s also very possible for the MAF sensor to cause a rough running condition without throwing a fault, or it could have a clogged fuel filter causing low fuel pressure. A clogged or sticking injector wouldn’t set a fault, but can cause a rough running condition as well. There could be a problem with a knock sensor or with the ignition timing. The best place to start would be checking if it’s a transmission problem or an engine problem. If it ends up being an engine problem, start by checking the fuel pressure and ignition timing. If you want to have this issue professionally diagnosed, you can contact a qualified independent technician through YourMechanic.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Truck is missing only when it is in gear

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: leaking brake fluid

The first thing to check is to see if you are getting low on brake fluid? The only two possible leaks that it can be where fluid comes out of the brake drum will be brake fluid or rear axle...

Q: Crankshaft not spinning freely 1997 Ford Ranger

Hi there - this engine is allegedly NOT an interference engine. Translation - if the timing belt breaks, or isn't present, it should not be possible for the valves to contact the pistons, and cause a lack of rotation as...

Q: Truck cranks but won't start after switching led light bar switch.

Hi there. Although we do not provide specific advice on mechanical issues due to aftermarket part accessory add-on's, it is quite possible that the addition of the amp switch, it's impacted the ignition system. I would start by verifying that...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.