how can i fix it

1997 ISUZU HOMBRE

197,000 MILES

ISUZU97

MEMBER
2 POSTS

This truck was sitting for 2 years and check engine lite was on. the code indicated random misfire and air mass problem. I replaced all 6 spark plugs ( needless to say had to take the front tires off to do that) and
replaced air filter and cleaned the air mass by spray i bought from lows
but after connecting everything it works a little worse than before and same readings come on. also antibrake lite is on.thank you for your advice. andi

Nov 6, 2011 at 4:17 PM

BILLYMAC

✓ASE Certified Mechanic
2,204 POSTS

Hi andy the anti brake is an abs prob most likely from sitting and will go away after driving for awhile.these vehicles have some elec probs. i would first check the plug that plugs into the throttle bore the harness corrodes right there and causes bad connection usually the wires will need repaired.

Nov 6, 2011 at 4:30 PM

ISUZU97

MEMBER
2 POSTS

I did not understand is electric plug cause of misfire or it was a response to antilock brake problem

Nov 7, 2011 at 6:06 AM

BILLYMAC

✓ASE Certified Mechanic
2,204 POSTS

sorry for the confusion. The elec connection could be the cause of the misfire.the plugs .if this truck is a v-6 and has individual coils then the coils can be bad but not usually a cause for random misfire. so yes the wireing harness is the usual suspect with this vehicle.this is a very complex fuel system as you already know i am sure.the mass airflow could be mad but first you have to make sure the elec conections are all good. good luck

Nov 7, 2011 at 10:29 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.