Q: Cruising steadily, loss of acceleration, and engine cutting out

asked by on

I was driving down the highway, cruising at about 50 MPH, when I experienced a loss of acceleration. Shortly after, complete loss of power and the engine cut off. I was able to, safely, roll to the side of the road where I sat and tried to diagnose the problem for a few hours but eventually had to call a tow truck. My vehicle is a 1990 Chevy Blue Bird Mini Bird, with a 6.2 diesel engine and a Turbo 400 transmission. It is based on the P30 step-van chassis. I was able to narrow it down to a fuel problem.. every time I try to crank the engine again, it sounds like it's going to start but it just won't. I don't believe there was fuel coming out of the fuel injectors (if there was, very little). One of the first things I checked was the tank (and I had plenty of fuel). My mechanic is telling me the fuel distributor (and the o-ring in it) needs to be rebuilt, probably, however I don't see anything online about a fuel distributor with my vehicle. Any thoughts or, hopefully, good news?

My car has 217000 miles.
My car has an automatic transmission.

Hi there. One of the most common issues with early 90’s diesel engines are the fuel injection pump’s o-ring can dry out or crack overtime causing fuel pressure and delivery issues.

Although it’s possible to rebuild the fuel pump, in most cases, it’s recommended to replace the pump with a new unit, especially if you’re going to keep the Blue Bird bus for a while.

Your Chevy most likely has a P-30 diesel fuel pump. Research that part and see if that’s the unit that matches the one on your vehicle. This type of vehicle is not one traditionally serviced by our professional mechanics, so hopefully your fleet mechanic will do a good job rebuilding or replacing the fuel pump.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
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. Cruising steadily, loss of acceleration, and engine cutting out

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: Turns over but wont start

There can be a few different possible causes of no start. The fuel pump may not be pumping fuel (Have to check fuel pressure). The ignition is not sparking to spark plugs (Check coil for spark and signal from...

Q: My 1990 toyota landcruiser turbo diese 1HDT has a top speed of 180 km/hr but it max out at 140km/hr. How can I fix this issue?

Hi Henry. Thanks for contacting us today. Although a vehicle might have a "top speed" (on the speedometer) - most vehicles are limited for safety or government regulations. A Land Cruiser should NEVER accelerate past 80 MPH as they are...

Q: 2500 RPM idle on cold start. Is this normal? If not, then is it due to a cold start injector?

A higher than normal idle can be due to a stuck open idle control valve or a vacuum leak in the intake when the engine is cold. You may have a bad cold start injector system. I would recommend having...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...