would a bad pick up coil cause surging at idle and trigger a code 44 lean exhaust ?

Asked by Jul 15, 2013 at 09:15 AM about the 1988 Chevrolet Suburban

Question type: Maintenance & Repair

5 Answers

No, not the coil. IF you mean P0440 that is EVAP leak, possible a vacuum leak and the will cause idle trouble and lean trim, but your '88 has OBDI and the scanner needs to be a good, high end one to "translate"

1 of 1 people found this helpful.

thinking vacuum leak or bad IAC. Code 44 is the GM OBD1 code for lean mixture detected by the O2 sensor. The coild would cause a miss fire and/or rich code

thanks andrew and david there is a brand new IAC new o2 sensor,new TPS new temp control sensor new plugs wires cap rotor fuel pump ,gas filter and i did go ahead and change the pickup coil,all to no avail.do you think the air pump could be the culprit ? thanks again,SUBURBANJEFF


check for vacuum leaks, air pump probably not the culprit. Also check the spray pattern of the injectors for a nice cone shape

thanks andrew,injecters are spraying fine,checked everywhere for vac leaks,been through 4 cans of throttle body cleaner,guess i should check fuel pres. any other suggestions ? appreciate the help and thanks again

Your Answer


Looking for a Used Suburban in your area?

CarGurus has 22,352 nationwide Suburban listings starting at $2,495.


Chevrolet Suburban Experts

  • #1
    Andrew Olsen
  • #2
    Neal Turner
  • #3
    Eric Fritz
View All

Related Models For Sale

Used Ford F-150
2,558 Great Deals out of 220,223 listings starting at $1,222
Used GMC Sierra 1500
887 Great Deals out of 59,331 listings starting at $1,980

Used Cars For Sale

2018 Chevrolet Suburban For Sale
11 Great Deals out of 8,462 listings starting at $41,820
2017 Chevrolet Suburban For Sale
128 Great Deals out of 4,763 listings starting at $34,499
2016 Chevrolet Suburban For Sale
45 Great Deals out of 1,140 listings starting at $29,850
2015 Chevrolet Suburban For Sale
59 Great Deals out of 1,729 listings starting at $22,995
2014 Chevrolet Suburban For Sale
24 Great Deals out of 508 listings starting at $13,495

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.