Engine code: need some consultation.....

Blacksheep · 04-28-2006, 05:44 PM

1996 Jeep Cherokee Sport 4.0L

Its been having some problems at low idle, like when I press on the gas, it hickups then goes...

Today, I get a harsh knocking from the engine (not a lifter, I KNOW what that sounds like). I then get a code 27 (or 28, not sure, lost count). Google'd it...

This is what a get...

27 Fault in injector driver interface circuit.

Any feedback?

Thanks all

YJeff · 04-29-2006, 12:14 AM

try running a bottle of injecter cleaner and clean the trottle body.

HTH

Blacksheep · 04-29-2006, 01:22 AM

Just did that before it spit the code out.

xjwest · 04-29-2006, 01:31 AM

bad injectors? or bad fuel pump? do you have problems starting up?

Blacksheep · 04-29-2006, 04:44 PM

Quote:

Originally Posted by xjwest

bad injectors? or bad fuel pump? do you have problems starting up?

No, it runs fine execpt it starts to hick up a bit when you are at driving, and let off the gas (like to let it at idel) and then apply.. but thats it...

And it did that for a good 200 miles before I added the gas cleaner and fixed the temp sensor...

My wife is right... sell it and take the TJ.....

Blacksheep · 04-29-2006, 04:45 PM

Quote:

Originally Posted by YJeff

try running a bottle of injecter cleaner and clean the trottle body.

HTH

*hugs*

... your AV is the reason I don't want to have kids... I'd produce something like that....

hwm3 · 04-29-2006, 05:04 PM

Fuel filter.

JEFF · 04-29-2006, 08:03 PM

Injector driver circuit is electrical related....... not fuel delivery. You need to get a schamatic (sp?) and trace the "driver circuit" form the injectors to where ever it goes probably the PCM. You probably have a wire that has rubbed through or has corroded inturnaly because the incelation got nicked some how. Visiuaily inspect the harness see if you can see any obvious damage to any of the wires.

xjwest · 04-30-2006, 03:19 AM

when was the last time the coolant temperature sensor was replaced. it helps control fuel/air ratios.

Blacksheep · 04-30-2006, 02:39 PM

Quote:

Originally Posted by xjwest

when was the last time the coolant temperature sensor was replaced. it helps control fuel/air ratios.

just did it. this worked fine when the sensor was broke. So now, its fixed, I get this. I also think I have some internal damage
b

sweathog · 05-07-2006, 06:23 PM

did you get this figured out?

I got the injector driver circuit error today after I replaced the fuel pump and filter.

sweathog · 05-07-2006, 07:11 PM

Ok. nevermind. I clamped a leaky fuel line and no more code.

Blacksheep · 05-07-2006, 07:54 PM

I beleieve the Jeep has thrown a rod, or soemthing worse. Will find out more when I tear into it soon.

So much for selling it... :*(

04-28-2006, 05:44 PM	#1
Blacksheep Me, Myself, and I Join Date: Aug 2002 Posts: 13,844	Engine code: need some consultation..... 1996 Jeep Cherokee Sport 4.0L Its been having some problems at low idle, like when I press on the gas, it hickups then goes... Today, I get a harsh knocking from the engine (not a lifter, I KNOW what that sounds like). I then get a code 27 (or 28, not sure, lost count). Google'd it... This is what a get... 27 Fault in injector driver interface circuit. Any feedback? Thanks all

04-29-2006, 12:14 AM	#2
YJeff holy crap. Join Date: Aug 2002 Location: 18960 Posts: 3,874	try running a bottle of injecter cleaner and clean the trottle body. HTH __________________ DCX: Killing the Jeep legend one year at a time. -'04 Dodge Ram 1500 (DD) -'96 ZJ (SOLD) -'95 YJ (PLOW JEEP) -'93 YJ (SOLD) -'84 CJ7 (PROJECT) McDonald4x4.com

04-29-2006, 01:31 AM	#4
xjwest Trail Guide Join Date: Nov 2002 Location: folsom,ca(home)ft.gordon(army) Posts: 1,430	bad injectors? or bad fuel pump? do you have problems starting up? __________________ Specialist E-4 West 1996 Cherokee Classic RE 5.5 X-duty long arm 4.56's Detriot Rear tru-trac front 8.25 w/29 chromo 33x13.50 Toyo MT's Warn M8000 with Warn winch bumper salvaged formattfab tail lights

04-29-2006, 08:03 PM	#8
JEFF Trail Guide Join Date: Aug 2002 Location: Hamburg Mi Posts: 154	Injector driver circuit is electrical related....... not fuel delivery. You need to get a schamatic (sp?) and trace the "driver circuit" form the injectors to where ever it goes probably the PCM. You probably have a wire that has rubbed through or has corroded inturnaly because the incelation got nicked some how. Visiuaily inspect the harness see if you can see any obvious damage to any of the wires. __________________ 96 XJ 2dr 3.5 RE 31's,4.10 gears rack, Hi-lift, lights, rust. 98 SKI-DOO MXZx 440 (FOR SALE)

04-30-2006, 03:19 AM	#9
xjwest Trail Guide Join Date: Nov 2002 Location: folsom,ca(home)ft.gordon(army) Posts: 1,430	when was the last time the coolant temperature sensor was replaced. it helps control fuel/air ratios. __________________ Specialist E-4 West 1996 Cherokee Classic RE 5.5 X-duty long arm 4.56's Detriot Rear tru-trac front 8.25 w/29 chromo 33x13.50 Toyo MT's Warn M8000 with Warn winch bumper salvaged formattfab tail lights

04-29-2006, 01:22 AM	#3
Blacksheep Me, Myself, and I Join Date: Aug 2002 Posts: 13,844	Just did that before it spit the code out.

04-29-2006, 05:04 PM	#7
hwm3 Trail Guide Join Date: May 2003 Location: Russellville, AR Posts: 4,748	Fuel filter.

05-07-2006, 06:23 PM	#11
sweathog Trail Guide Join Date: Dec 2002 Location: Arizona Posts: 564	did you get this figured out? I got the injector driver circuit error today after I replaced the fuel pump and filter. __________________ Trail: XJ Daily: WJ Limited Tow: 'Burban

05-07-2006, 07:11 PM	#12
sweathog Trail Guide Join Date: Dec 2002 Location: Arizona Posts: 564	Ok. nevermind. I clamped a leaky fuel line and no more code. __________________ Trail: XJ Daily: WJ Limited Tow: 'Burban

05-07-2006, 07:54 PM	#13
Blacksheep Me, Myself, and I Join Date: Aug 2002 Posts: 13,844	I beleieve the Jeep has thrown a rod, or soemthing worse. Will find out more when I tear into it soon. So much for selling it... :*(