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Ask Don 'Mo Lurch' Your Own Que...
Don 'Mo Lurch'
Don 'Mo Lurch', Aftermarket & Factory Electronics
Category: Chrysler
Satisfied Customers: 518
Experience:  Cert. Chrysler Warnty, Heavy Line Mech, Mobile Electronics. Sales, Installation & Repair for 30 years
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99 chrysler town and country lxi cranks but no start getting

Customer Question

99 chrysler town and country lxi cranks but no start getting fuel at rail and changed cam and crank sensor 3.8 l
Submitted: 1 year ago.
Category: Chrysler
Expert:  Amedee replied 1 year ago.

Hello and welcome! My name is ***** ***** I can assist you with your question. Does the engine have spark when cranking? Are there any codes in the computer?

Customer: replied 1 year ago.
I only tested front spark on one plug but yes in the one
Customer: replied 1 year ago.
I havnt tested dtc im 30 miles away from van
Expert:  Amedee replied 1 year ago.

You might just have a bad fuel pump. Does it run on starting fluid?

Customer: replied 1 year ago.
Oil smells like gas little too
Customer: replied 1 year ago.
No start with starting fluid and you hear pump when key is switched on and relay clicks too
Expert:  Amedee replied 1 year ago.

Ok, then your going to want to check engine compression. The camshaft may have broke.

Customer: replied 1 year ago.
But it sounds like it cranks fine
Customer: replied 1 year ago.
What would cause that to happen if it is the cam
Expert:  Amedee replied 1 year ago.

Well something is clearly not right because the engine does not start. Your either missing spark, fuelor compression.. or the timing can be off. ignition timing or valve timing. The only other possibility would be if the engine is flooded. IF you have not checked fuel pressure or checked engine compression, then how do plan on diagnosing this condition? You need to check the basics.

Expert:  Amedee replied 1 year ago.

a bad design and, low or dirty engine coil can cause the camshaft to break.

Customer: replied 1 year ago.
The fuel pressure was at lik 47 psi
Expert:  Amedee replied 1 year ago.

I think that might be a bit low, but the engine should still start and run on 47 psi

Expert:  Amedee replied 1 year ago.

So that tells us it is something else. Missing spark or compression.

Customer: replied 1 year ago.
I need to do compression test next then i guess
Expert:  Amedee replied 1 year ago.

I would agree. At least the front three. You may need to do the back three.

Expert:  Amedee replied 1 year ago.

If you find low compression on some cylinders, you may want to remove the valve cover and then have someone crank the engine over.

Expert:  Amedee replied 1 year ago.

If the valve are moving towards the front of the engine but not at the back half, the camshaft broke.

Customer: replied 1 year ago.
Is there a way to test coil pack with test light to see if its getting power for spark
Expert:  Amedee replied 1 year ago.

If you upload a video for me so I can hear it that would be great. YES, but it is not easy. You need to verify if in fact you are missing spark first.

Customer: replied 1 year ago.
if i put a in line spark checker in spark plug do i need to check all 6 or can i just do 1 the problem i have is the back 3 are hard to get to
Expert:  Amedee replied 1 year ago.

Right, I understand. I am familiar with this engine. Lets start by checking the front three cylinders (easy ones) first for spark while cranking.

Customer: replied 1 year ago.
I pulled one plug and crancked engine and got spark on one plug when i did it befor
Expert:  Amedee replied 1 year ago.

Ok, lets check the others in front.

Customer: replied 1 year ago.
Im not by car but the front had spark im sure of
Customer: replied 1 year ago.
Can coil not be givvin enough spark
Expert:  Amedee replied 1 year ago.

Sure its possible but I doubt it is a bad coil. You can certainly try one but my experience has been that it is going to be something else. So our testing has now lead us to this. The engine has spark and fuel pressure. We also know it does not run on starting fluid so that rules out in injector pulse and bad gas. This would mean the engine has spark at the wrong time.. due to a bad flex plate or base engine mechanical problem.

Customer: replied 1 year ago.
is engine scrap
Customer: replied 1 year ago.
Or can be fixed
Expert:  Amedee replied 1 year ago.

It depends on whats wrong. Anything can be fixed. Its just a matter of how much money you want to put into it.

Customer: replied 1 year ago.
But you dont think its just a sensor or pcm or antitheft keeping it from starting
Expert:  Amedee replied 1 year ago.

Based on what your telling me, No. The cam and crank sensor have been replaced. If the engine has spark, it is up and "awake" and functioning correctly. This means there is no bad sensors.

Expert:  Amedee replied 1 year ago.

The anti theft would cause a start and stalling and then a no crank condition. This is not what you have

Customer: replied 1 year ago.
to test this i need a compression test if no pressure in cyl then bad motor if pressor ?
Expert:  Amedee replied 1 year ago.

If there is low compression, then yes, it may be more costley to simply replace the engine rather than fixing it. But again, it all depends on what is broke. If there is pressure, then we need to keep looking for the problem. But if all three cylinders in front have good compression, then we need to run a compression on the back three cylinders.

Customer: replied 1 year ago.
Ok i guess i will have to run compression test on all cyl
Expert:  Amedee replied 1 year ago.

Correct.

Customer: replied 1 year ago.
What is compression supposed to be
Expert:  Amedee replied 1 year ago.

Well over 100 psi. Closer to 150 psi

Customer: replied 1 year ago.
How do you get to back plugs to test any pointers
Expert:  Amedee replied 1 year ago.

Very carefully. :)

Expert:  Amedee replied 1 year ago.

You should be able to get them from the top rather than from underneath. The front cowel below the windsheild may be able to be removed for more room.

Customer: replied 1 year ago.
Ok ill try compression next time im at van
Expert:  Amedee replied 1 year ago.

Sounds good let me know.

Customer: replied 1 year ago.
It will be a cupple days how can i get back in tuch with results
Expert:  Amedee replied 1 year ago.

Just reply back to me on this page and I will get it. Please allow time in between replies as I do work full time.

Customer: replied 1 year ago.
Ok thanks
Expert:  Amedee replied 1 year ago.

You bet

Customer: replied 1 year ago.
Hello amedee
Expert:  Amedee replied 1 year ago.

Hi! What have we found?

Customer: replied 1 year ago.
Cyl 2 no comp and cyl 4 50 psi
Expert:  Amedee replied 1 year ago.

Ok, then the camshaft broke or the timing chain broke.

Customer: replied 1 year ago.
How hard to replace and whats cost efficient
Expert:  Amedee replied 1 year ago.

The best thing to do is replace the engine at this point.