Help me diagnose the LRZ?

t1h5ta3 · Aug 18, 2009

sounds like pluged/dead injector to me then....
i belive its a typical batch fire setup, not seqential, so shuldnt be an ecm issue, grab a test light, you can verify if its getting signal ( ie: test the wireing)

Skid Mark · Aug 18, 2009

After doing all the sub systems I.E. fuel, spark Doing a comp test is one easyest ways to elimate what I hope it's not but I had my mom's 96 geo tracker with the same-ish motor was on a steep incline the oil was not being picked up in the pan and it started to flatten cam lobes by the end of the day it ran like **** and mom's beat my ass

this was in 1996, all in all It had flaten the two lobes farthest from the pump. so I realy hope its not that but a comp test will elimanate it or just a stuck valve.

And yes I know keep it simple:flipoff: just sharing a simular experiance.:beer:

Little Red Zuk · Aug 18, 2009

GetSumGasPedalMakItDeeper said:
After doing all the sub systems I.E. fuel, spark Doing a comp test is one easyest ways to elimate what I hope it's not but I had my mom's 96 geo tracker with the same-ish motor was on a steep incline the oil was not being picked up in the pan and it started to flatten cam lobes by the end of the day it ran like **** and mom's beat my ass this was in 1996, all in all It had flaten the two lobes farthest from the pump. so I realy hope its not that but a comp test will elimanate it or just a stuck valve.

And yes I know keep it simple:flipoff: just sharing a simular experiance.:beer:

Compression is 155

Skid Mark · Aug 18, 2009

Little Red Zuk said:
Compression is 155

On all 4 obviosly?

cool, good comp

then I 2nd the plug wire's or pick up or fuel presure

:beer:

Kat · Aug 18, 2009

I'll come over to your work and pull it around the parking lot and see what happens.

zukkev · Aug 18, 2009

GetSumGasPedalMakItDeeper said:
After doing all the sub systems I.E. fuel, spark Doing a comp test is one easyest ways to elimate what I hope it's not but I had my mom's 96 geo tracker with the same-ish motor was on a steep incline the oil was not being picked up in the pan and it started to flatten cam lobes by the end of the day it ran like **** and mom's beat my ass this was in 1996, all in all It had flaten the two lobes farthest from the pump. so I realy hope its not that but a comp test will elimanate it or just a stuck valve.

And yes I know keep it simple:flipoff: just sharing a simular experiance.:beer:

First thing to go on most zuki motors is the crank, specifically #4...

zukkev · Aug 18, 2009

Little Red Zuk said:
Got compression.
Switched #3 and #4 wires, still no change, #3 still no worky.

Power to hot lead on injector unplugged.
Power to ground lead injector plugged in.

Now what?:eeek:

Did you crank it with the test lite probed to the ground side???Did it flash???

Little Red Zuk · Aug 19, 2009

zukkev said:
Did you crank it with the test lite probed to the ground side???Did it flash???

Did not crank, as my arms are not that long. I will get some assistance tomorrow.

zukkev · Aug 19, 2009

Little Red Zuk said:
Did not crank, as my arms are not that long. I will get some assistance tomorrow.

Don't poke yourself with the test light!!!:fawkdancesmiley:

It hurts!!!

t1h5ta3 · Aug 19, 2009

Little Red Zuk said:
Did not crank, as my arms are not that long. I will get some assistance tomorrow.

the starter is only about a foot below the injector...? your arms arnt that long? :haha::haha:

t1h5ta3 · Aug 19, 2009

do you need me to bring your backup transportation to you today? ill be stopping by in a coupple hours..

oh, and you need to stop by, the neighbor wants this gone...

Little Red Zuk · Aug 20, 2009

Not flashing on ground while cranking. ECM?

zukkev · Aug 20, 2009

Little Red Zuk said:
Not flashing on ground while cranking. ECM?

Did you check it with the injector plugged in? So I take it the light was on solid on the ground side when cranking? If so, then you need to check out the wiring before condemning the ECM...

Little Red Zuk · Aug 20, 2009

Probe in ground wire with engine cranking got me a solid light. So start tracing wires, see what's what?

zukkev · Aug 20, 2009

Little Red Zuk said:
Probe in ground wire with engine cranking got me a solid light. So start tracing wires, see what's what?

using a couple jumper wires, unplug the #3 inj plug, and tie the test light into the harness, as if it were the injector, then crank...does it flash then???