Injectors?

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Chero-King

NAXJA Forum User

Location

Up here eh?

• Jul 9, 2006

• #1

I just put my engine back in last night after replacing seals, gaskets, rings,crank bearrings, etc. and I got it to start today but it's not running right, the idle goes up and down, almost stalls, then actually stalls. I'm pretty sure it's a bad injector as its putting out some black and blue smoke .
It's done this before and it was fine after replacing a couple injectors but I'm not a 100% sure its the same thing this time. Any other ideas?
Oh, its and its an 4L '88

 

CanMan

NAXJA Forum User

Location

Lake Tapps, WA

• Jul 9, 2006

• #2

Chero-King said:

I just put my engine back in last night after replacing seals, gaskets, rings,crank bearrings, etc. and I got it to start today but it's not running right, the idle goes up and down, almost stalls, then actually stalls. I'm pretty sure it's a bad injector as its putting out some black and blue smoke .
It's done this before and it was fine after replacing a couple injectors but I'm not a 100% sure its the same thing this time. Any other ideas?
Oh, its and its an 4L '88

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Do you have a manual? I would go through and check your recheck connections. Usually black smoke is from too much fuel, blue is oil, and white is coolant/water.

 

C

Chero-King

NAXJA Forum User

Location

Up here eh?

• Jul 10, 2006

• #3

No, its an auto. I've rechecked all my connections a few times and everything seems to be in order, although I think a couple of my vaccum are wrong but I dont think thats the problem. I'm probably going to change a couple injectors tomorow but I'd still like some input.

 

CanMan

NAXJA Forum User

Location

Lake Tapps, WA

• Jul 10, 2006

• #4

Chero-King said:

No, its an auto.

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Hehe, I meant a service manual, like Hayes or Chiltons. They probably have a diagnostic guide in one of them. If you can get your hands on a FSM, that would be better.

 

Saudade

NAXJA Member

NAXJA Member

Location

SoCal

• Jul 10, 2006

• #5

I think he meant a shop manual, not a manual trans.

 

C

Chero-King

NAXJA Forum User

Location

Up here eh?

• Jul 10, 2006

• #6

ooohhh haha... its been a long day :laugh:...
Yeah I have a hayes manual, I'll check my connections a little later.

 

X

XJING

NAXJA Forum User

Location

Westcoast, Florida

• Jul 10, 2006

• #7

Map sensor or EGR not hooked up will do exactly what yours is doing. Renix motors once again, all sensors have to be in the game, check MAP make sure connection is good and vacumn line not cracked, next check EGR valve, (under the intake drivers side) make sure the rod goes up and down and vacumn line is good. Good Luck

 

C

Chero-King

NAXJA Forum User

Location

Up here eh?

• Jul 10, 2006

• #8

Where's the map sensor? I found it in the book but not in the jeep. And Im pretty sure my egr valve is good, I made sure I hooked it up today.

 

C

Chero-King

NAXJA Forum User

Location

Up here eh?

• Jul 10, 2006

• #9

Never mind, found it.

 

jeepdude10000

NAXJA Forum User

Location

LaLa land!

• Jul 10, 2006

• #10

map sensor is on the firewall, it has a vaccuum hose on the bottom of it and hooked to the intake.

 

C

Chero-King

NAXJA Forum User

Location

Up here eh?

• Jul 10, 2006

• #11

Figured it out.
It was the MAP sensor, I lost the line going from it to the throttle body so I just took one off a parts jeep, hooked it up and runs like new.
thanks for the help guys.