Q: Rough idle, clacking noise from engine under higher load

asked by on

i myself am a mechanic at a reputable repair facility, though my stronger suits are the import 4 bangers, ive been working on euros more often than not....enough enough......1993 tercel with the EFI 1.5l 3E-E..car arrived running, customer complains vehicle would not accelerate over 30-40 MPH...did typical tests, compression was a little low, 100PSI across the four..installed new plugs, checked for vacuum leaks, none found...vehicle would start and idle for about 30 seconds then idle would surge up and down...cleaned IAC, seemed to help surge issue...test drove and vehicle ran fine.....vehicle slept in shop stall last evening...ok so , today...vehicle was a no start and after draining gas tank, fresh gas and cleaning plugs multiple times,,car will start and idle, but idle is so low vehicle seems to want to stall...oh and did i mention jumping pins TE1 and E1, no codes retrievable....?

My car has 120620 miles.
My car has a manual transmission.

Hi there. From the description you have provided, the vehicle you are working on needs further diagnoses. First, 100 PSI for cylinder compression is inadequate. I would look into whether valve timing is correct. An incorrectly timed camshaft could cause low cylinder compression across the board and may account for the clacking noise.

Improperly adjusted valves could also create the same condition. As part of your description, you stated, after doing some repairs the vehicle ran fine. This is somewhat confusing. If the exhaust is restricted, (e.g. from a partially plugged catalytic converter) that should of been felt on the road test. The next day, the vehicle being a no start would lead me to check fuel pressure and for spark. Ignition timing could also be improperly set. If you find yourself unable to locate the area of fault. I recommend having the vehicle’s lack of power diagnosed by a certified technician, such as one from 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. Rough idle, clacking noise from engine under higher load

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: Vibration in car.

The most likely problem you are describing is the front brake rotors are warped. The rotors would need to be replaced with the brake pads at the same time. I would recommend the brakes and front end be checked first...

Q: stiff steering wheel after adjusting tire pressure.

The pressure would have to be very low for it to affect your steering effort. But maybe it is. Most auto stores have a basket of tire gauges that they sell on the counter for a few dollars. Most of...

Q: Dash lights are out on my Ford Ranger.

Check the ground wiring under the dashboard to see if it is loose. A loose or broken wire will cause electrical issues with the dash lights and cigarette lighter to not work. If you need further assistance with your electrical...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...