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02 jeep gc laredo no 2 injector pulses for a few seconds then goes away.chcked it with noid.

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Change to supreme gas

Posted on Oct 20, 2013

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2006 wrangler x no pulse on injector #3&4, others are fine. (name them? all?)


Cud b voltage issue. Unplug them and clean contacts. Also u cud unplug computr and clean pins . Older cars have corrosion

Jan 27, 2016 | 2006 Jeep Wrangler X

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I have no injector impluse


no injector pulse - DodgeForum.com

dodgeforum.com/forum/2nd-gen-ram.../269362-no-injector-pulse.html
Nov 21, 2010 - no injector pulse 2nd Gen Ram Tech. ... but was running and driving fine before. as far as i can tell i have no injector pulse. tested with a noid ... No spark AND no fuel injector pulse ONLY when van is cold ...
Nov 18, 2013
2000 ram 1500 Has spark but no injector pulse wont start ...
Jun 25, 2013
v10 RAM no start....frustrated
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help - no spark, no injector pulse, no run
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Oct 23, 2015 | Dodge Cars & Trucks

1 Answer

2011 swift 1.5 no injector pulse no spark


blown fuse. ; is first, as per always.
2nd is scan it, did you scan it yet? that is always 2nd.
all efi engines, all ECU , all cut injectors for (noid lamp test dead?)
you said pulse,does that mean fuel pulse or electronic pulse to injector coil..... ? all injectors dead. or just 1. same for spark.
toss coin land, noid dead. all noids
loss of. NOID signals.!
1; spark
2: lose of CMP or CKP signals (cam or crank senders)
3: ecu sees wide open throttle it cuts fuel 100%
4: ecu bad, is CEL lamp dead key on? scan it.

Apr 01, 2015 | Suzuki Swift Cars & Trucks

1 Answer

02 wrx i have code p1507 and i have injector 2 has a pulse while cranking but goes away once the car is running?


How are you checking the voltage to the injector? The injector voltage at idle is hard to determine with a convention test light.

Mar 23, 2014 | Subaru Impreza WRX STi Cars & Trucks

1 Answer

Fuel injectors quit working


fuse power to rail injector must be good check fuses first.
is CEL glowing key ?
ok,no engine stated. this the 4 liter? I6? nah you said HEADS
not 2.5L I4
not 4.0 L I6
so must be V6, really
or the 2.1L diesel....>>>>
and 3 or 4 diffr. EFI systems, im not much help
why folks post engine free ,amazes me....

it takes 2 things.
fuel pressure over 30psi (generic)
and the noid lamp passing on injector.

and the knowledge that all jeeps,(cars) cut fuel (gas)
if the PCM see and errors with (crank for 5 seconds)
1: spark?
2: CMP?
3: CKP?
4: if IMMO , that too, no imm on 87, think , go lazy to look up.

If the NOID lamps fail x6 (no injection pulses)
then the ASD relay is dropping out)
87 is the really really old RENIX/Benicx injection system. on 4L
i had a 88. same car.
see alldata.com for permissive to inject.

on my old I6 4L Renix sys
the injectors are all grounded , that is correct
and the ECU drives this hot switched ! unlike most cars.
back then the ASD was called the LATCH relay.
if it dont pull in and stay , it will not run.

Ill stop there. until you say what engine and country car resides.
export jeeps are wired different (laws)

Feb 15, 2014 | 1987 Jeep Comanche

1 Answer

2004 jeep grand Cherokee fuel injectors stay open


If not pulsing, could be a bad pcm. The computer grounds the injectors internally for a split second to pulse them . If trash or debris is not making them stick open, buy a "noid light" for checking injector circuits. Plug it in to #1 or #5 and crank engine over: if circuit is working right, noid light will be blinking. If light is on steady, computer is not interrupting ground to cause pulsing.

Jul 11, 2013 | Jeep Grand Cherokee Cars & Trucks

1 Answer

I am having a misfire on cylinder 2 but not sure how, I replaced the head, the plug, the wires and the coil pack....what am I missing. No pun intended.


Run tests to see why missing: spark test on no. 2, need a good blue spark to rule out ignition problem. Gas test: make sure injector for #2 is pulsing-is gas getting into the cylinder? Pull the plug after cranking a few seconds and see if wet with gas, or check for a pulsing signal on the injector. A "noid" light can be purchased cheap, it plugs into injector connector and blinks if wiring is working right.
If still no help, you need a compression test to check compression on #2. Low compression may indicate a head gasket failure or valves not sealing properly.

Jun 28, 2013 | Cars & Trucks

1 Answer

2001 pontiac grand am,2.4- no start- crank normal,fuel pump running,has spark,but no injector pulse,and not dtcs. used noid light at injector connector,lights not flashing,still has spark. reinstalled...


No, not the ICM. Maybe your pcm is, or was, at fault. Or the injector wiring. The injector circuit is pretty simple. The injectors fuse (under the hood) has power to it with key in on or start. so each injector always has power to it in run or start. the injector ground wire goes into the pcm where it is internally grounded for a split second-and that is how you get the injectors pulsing-when the injector circuit is internally grounded. Those internal grounds have been known to fail, just not often.
If it happens again, check the injector wiring, look for bad connections or corrosion at connectors. Check for power on injector power wire with key in ON. Also pull the connectors to the pcm (take negative battery cable off first) and look for bent pins in the connectors or loose or corroded connections.

The injector is an electrical solenoid. when it has power and ground, the solenoid is energized, a pin is raised, and the injector opens to spray fuel out. It's pretty simple, much simpler than a carburetor with over a hundred parts to it.

Mar 29, 2017 | 2001 Pontiac Grand Am SE

1 Answer

2002 Jeep GC Laredo: Starts up then stalls within seconds


Does the vehicle crank for extended period of time upon first starting? If so the fuel pump needs replacing.

Apr 15, 2009 | 2002 Jeep Grand Cherokee

1 Answer

No injector pulse, no current to the injector


Check the pickup in the distributor as this is the cam sensor. The injectors run of the pulses created while the rotor is turning around. It should be a plastic disk located under the rotor button.

Mar 13, 2009 | 1990 Jeep Wrangler

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