WONT CRANK

1988 Nissan Maxima

Tiny

robincampbell78

September, 12, 2013 AT 11:08 AM

Its getting fuel, changed plugs, checked all lines it acts like it wants to crank but doesn't
it trys to turn but its like it wont fire but it is I don't know what else to try. If thre is any infou can give me to help itwould be appreciated

FOUND 6783 RELATED QUESTIONS

1 Answer

Tiny

Wrenchtech

September, 12, 2013 AT 11:28 AM

All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

4) If all of these things check good, then you would need to do a complete compression test.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.

Please login or register to post a reply.

Battery Replacement
Battery Replacement Guide
Starter Replacement
Battery Replacement Honda Civic 2006-2011
Battery Replacement Ford Contour 1996-2000
Battery Replacement Ford Escape 2000-2006