still need help! wont start...
07-22-2007, 02:47 PM
#11
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
RE: still need help!
Inside the dizzy there is a reluctor ring.. looks like a chinese throwing star and to the left a magnetic pick up.....this works kind of like a crank sensor in that it uses this signal to id what cylinder is coming up in the firing order can't remember which wires you scope but to test it normally you set your multimeter to a/c voltage and crank the motor over and you should have a occilating figure..... you should be able to go to th help section on 5oh.com or sbf.com I'm not to farmiliar with these do it your selfer sites as I use ALL DATA and scan tools and occiliscopes at my shop . other people who are more farmiliar with navigating these sites may now where to pull the tests in a matter of minutes.
07-22-2007, 03:12 PM
#12
5th Gear Member
Thread Starter
Join Date: Mar 2006
Location: Massachusetts, New Bedford
Posts: 3,035
RE: still need help!
ORIGINAL: Joel5.0
For the pulse check with a 12-vdc test light, you would have to use a paper clip extension from the alligator clip side of the test light, and connect it to one of the pin terminals in the injector connector, then probe the other injector connector pin .....like using the test light as a jumper.....then check for the pulse.
You could also use a 194 replacement bulb or an LED and attach either to the injector connector pins; and check for the pulse while the engine cranks, or while you rotate the distributor back and forth with the key in IGN ON.
If there's no injector pulse and the fuel pump doesn't turn engine cranking = possible stator sensor failure..............no injector pulse, and fuel pump turns on while engine cranks = possible bad ECM.
Another check you should do.....is disconnect the SPOUT and see if the engine starts. LUK
For the pulse check with a 12-vdc test light, you would have to use a paper clip extension from the alligator clip side of the test light, and connect it to one of the pin terminals in the injector connector, then probe the other injector connector pin .....like using the test light as a jumper.....then check for the pulse.
You could also use a 194 replacement bulb or an LED and attach either to the injector connector pins; and check for the pulse while the engine cranks, or while you rotate the distributor back and forth with the key in IGN ON.
If there's no injector pulse and the fuel pump doesn't turn engine cranking = possible stator sensor failure..............no injector pulse, and fuel pump turns on while engine cranks = possible bad ECM.
Another check you should do.....is disconnect the SPOUT and see if the engine starts. LUK
and my fuel pump turns on i get 40psi of fuel pressure and i have spark
07-22-2007, 03:28 PM
#13
5th Gear Member
Thread Starter
Join Date: Mar 2006
Location: Massachusetts, New Bedford
Posts: 3,035
RE: still need help!
alright so im an idiot i didnt connect the test light correctly.. but the light doesnt get bright the filliment turns orange like its not gettin enough volts.. i also checked the volts from the orange wire for the tps to the battery and i only got like 1.75v when ur link says 5v and the same with the evp wire also i have a 31 code KOEO.. EVP low voltage.. so what could be causing all of this low voltage?
07-22-2007, 03:48 PM
#14
5th Gear Member
Join Date: Jan 2006
Location: Puerto Rico
Posts: 3,926
RE: still need help!
ORIGINAL: nacanitihs
alright so im an idiot i didnt connect the test light correctly.. but the light doesnt get bright the filliment turns orange like its not gettin enough volts.. i also checked the volts from the orange wire for the tps to the battery and i only got like 1.75v when ur link says 5v and the same with the evp wire also i have a 31 code KOEO.. EVP low voltage.. so what could be causing all of this low voltage?
alright so im an idiot i didnt connect the test light correctly.. but the light doesnt get bright the filliment turns orange like its not gettin enough volts.. i also checked the volts from the orange wire for the tps to the battery and i only got like 1.75v when ur link says 5v and the same with the evp wire also i have a 31 code KOEO.. EVP low voltage.. so what could be causing all of this low voltage?
Recheck VREF at the TPS with the VOM and sensor disconnected (check the wire at the harness corresponding to the orange wire on the sensor side), confirm the low voltage reading.....if low voltage is present, while monitoring VREF output.....disconnect the EVP, and BP sensors.....does VREF output go to 4 - 6 vdc?....
07-22-2007, 05:37 PM
#17
5th Gear Member
Join Date: Jan 2006
Location: Puerto Rico
Posts: 3,926
RE: still need help!
Start with the TPS disconnected and monitor the VREF at the TPS harness connector......if VREF is below 4 vdc, disconnect the EVP sensor and check at TPS connector, if it's still under 4 vdc, disconnect the BP sensor and check voltage reading at TPS connector......
