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i have a plymouth laser we replaced the engine with a new

Sent to Car Experts January 08 04:25 PM

I have a 1991 Plymouth Laser. We replaced the engine with a new (rebuilt) long block. It won't sart. It turns over fine, has ignition and fuel. It has good compression. How do I check the ignition timing if it won't start?

Optional Information:
1991 Mitsubishi Laser 2.0

Already Tried:
We rebuilt the engine. followed Haynes manual for rebuild, installing a long block. the engine turns over, has spark to #1 plug, has fuel, but won't start. It backfired once. I tried starting fluid, but it just smoked. I think I may be 180 off on the ignition timing, but can't find any way to check this with a non starting engine. I believe my problem is a timing issue. I know that the timing belt is correct. It has to do with the Distributer-less ignition, which is attached to one of the cam shafts.

Customer (name blocked for privacy)
Status:  Closed   Value: $30
Info Request
January 8 4:28 PM (2 minutes and 47 seconds later)
         

What engine do you have?

Are you getting any backfiring?

What do you mean by it having fuel? Did you test the fuel pressure and check pulse with a noid light?



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Reply
January 8 5:27 PM (58 minutes and 50 seconds later)
         
I have the 2.0 turbo.

I did get backfire once. I changed the position of the ignition 180 and now it does not backfire.

I did not check the pressure or pulse. I just disconnected the return line from the fuel injection line.

I used starting fluid through the air intake, figuring that it would fire if everything else was correct.
Customer (name blocked for privacy)
Answer
January 8 5:40 PM (12 minutes and 59 seconds later)
         
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Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2716 Car Accepts
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January 10 5:31 PM (1 day and 23 hours later)
         
The engine has a distributorless ignition. On the back side of the rear/left cam shaft is a "Crankshaft Position Sensor". It senses the position of TDC for the #1 cylinder (and determines when to fire each plug, etc.)and is used for adjusting timing. It is adjustable clockwise and counterclockwise, like a distributer is. That is why I thought it may have been installed 180 degrees wrong. When installing this sensor, it has a notched shaft, which can be roated by hand. Can this sensor be install wrong by rotating the shaft 180 degrees? Thanks for the response, I was waiting for an E-mail, didn't know how to use the program, sorry for the delay in getting back to you.
Customer (name blocked for privacy)
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January 10 7:32 PM (2 hours and 1 minute and 30 seconds later)
         
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Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2716 Car Accepts
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January 12 12:28 PM (1 day and 16 hours later)
         
Thanks for the reply, but the engine won't start in order to follow these instructions. Is there a way to insert the sensor on a new engine build or replacement of the sensor?
Customer (name blocked for privacy)
Reply
January 12 12:30 PM (2 minutes and 1 second later)
         
Can the sensor be installed 180 degrees off? Or do I just install it and make adjustments after I get it started? Thanks again, I know this is a bit confusing. I want to make sure that I haven'e put the sensor in wrong.
Customer (name blocked for privacy)
Answer
January 12 7:02 PM (6 hours and 32 minutes and 20 seconds later)
         
ACCEPTEDCheck Mark

NOTE : Crank Angle/TDC sensor are replaced as a complete unit.

  1. Disconnect battery ground cable.
  2. Place an alignment mark on sensor body and engine block, indicating position of sensor body in block or cylinder head. Place No. 1 cylinder to TDC of compression stroke. Do not use a sharp tool to place alignment marks on sensor body and engine block or cylinder head.
  3. Disconnect wiring harness from sensor.
  4. Remove sensor mounting nut, then the sensor assembly from engine.

Images available only to Customers.

NOTE : Crank Angle/TDC sensor are replaced as a complete unit.

  1. Disconnect battery ground cable.
  2. Place an alignment mark on sensor body and engine block, indicating position of sensor body in block or cylinder head. Place No. 1 cylinder to TDC of compression stroke. Do not use a sharp tool to place alignment marks on sensor body and engine block or cylinder head.
  3. Disconnect wiring harness from sensor.
  4. Remove sensor mounting nut, then the sensor assembly from engine.


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