My engine light keeps coming on in my 1989 pontiac boneville it lurches and cuts out what could the problem be?

30

Asked by Oct 23, 2013 at 07:24 PM about the 1989 Pontiac Bonneville

Question type: Maintenance & Repair

I've changed my o2 sensor the throttle
position sensor and the ecm or icm
computer under the dash. I'm getting
terrible gas mileage. Plus my
speedometer dont work

9 Answers

I'd clean off the 1/0 Black cable off of the battery as it attaches to ground...with a coarse wirebrush undo the bolt holding the lug on, wirebrush the territory where the lug was and then the lug too~ connect so that the full starting amperage of 300-500 cold cranking amps can make it through this connection and yet the chassis ground that supplies the ignition, fuel pump and the gauges can get proper grounding.....YES it is that important....also get a NEW battery~

1 out of 1 people think this is helpful.
30

I have cleaned the battery cable the negative one it was loose but I replaced the bolt. And cleaned it up

1 out of 1 people think this is helpful.
30

I've had it tested and codes ran the third and forth gear on transmission is showing up which is 28 and 28 code. Also another code is 42 that is showing up any suggestions on what to do next?

1 out of 1 people think this is helpful.

clear the codes with an OBD-II scanner....replace the negative terminal and reset the clock to the correct time~

perhaps you could test the voltage at the dashboard...should be a solid 12.5 volts there or the ground connection still has to have the corrosion removed....get 'er clean use sandpaper if you have to~

Best Answer
30

The clock is set to the right time.

1 out of 1 people think this is helpful.

codes should be PXXX such as P0420....p for powertrain...put your mitts on one of these OBD-II readers (available from amazon) then read and clear the codes....they seem to pertain to exhaust emissions~

are you gettin' real shitty gas mileage?...stinky exhaust?

1 out of 1 people think this is helpful.

the OBD-II port is always within three feet of the ignition switch~

Your Answer

Add photo

Related Questions

Bonneville

Looking for a Used Bonneville in your area?

CarGurus has 644 nationwide Bonneville listings starting at $1,375.

ZIP:

Search Pontiac Bonneville Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Pontiac Bonneville Experts

#1 ticklemedaly
ticklemedaly
Reputation 360
#2 Js08016
Js08016
Reputation 330
#2 dandyoun
dandyoun
Reputation 330
View All

Related Models For Sale

Used Pontiac Grand Prix
22 Great Deals out of 3,703 listings starting at $879
Used Chevrolet Monte Carlo
21 Great Deals out of 1,688 listings starting at $2,491
Used Buick LeSabre
11 Great Deals out of 2,267 listings starting at $1,299
Used Pontiac Firebird
15 Great Deals out of 782 listings starting at $2,495
Used Pontiac Grand Am
1,643 listings starting at $1,298
Used Chevrolet Camaro
417 Great Deals out of 40,746 listings starting at $3,500
Used Buick Regal
154 Great Deals out of 11,650 listings starting at $1,850
Used Nissan Maxima
392 Great Deals out of 24,517 listings starting at $999
Used Chevrolet Caprice
172 listings starting at $13,999
Used Ford Mustang
541 Great Deals out of 43,036 listings starting at $1,699

Used Cars For Sale

2005 Pontiac Bonneville For Sale
3 Great Deals out of 103 listings starting at $2,495
2004 Pontiac Bonneville For Sale
3 Great Deals out of 64 listings starting at $1,400
2002 Pontiac Bonneville For Sale
83 listings starting at $1,375