engine only running on #1 AND #3 cylinder ,new timingchain,crank sensor,head gasket,plugs,coils ,cover ,plug boots,different computer box,180 lbs compression,injectors work ok.fuel press ok

Asked by Jun 15, 2017 at 08:34 PM about the 1994 Pontiac Grand Am 4 Dr SE Sedan

Question type: Maintenance & Repair

3 different GM dealers said no security in key,12.3 volts to each fuel injector for 2-3 seconds when key is turned on ,no spray at injector,wires from injector to computer good mo breaks..module above coils checked ok at advance auto.

2 Answers

27,795

SO IT HAS A MISS??? WHAT ENGINE....4 CYLINDER??? FUEL PRESSURE OK? 12 VOLTS TO NON FIRING INJECTORS? 12 VOLTS TO ALL COILS??? WHAT ARE THE CODES NOW???? HOW MANY MILES ONIT SINCH BATTERY WAS RECONECTED???

945

Did you have the cylinder head checked when you had it off. The quad four and its single cam baby sister both had nasty cylinder and block cracking problems after even a mild overheat. A compression check should be able to confirm block cracking but a leakdown test using high pressure shop air will test the integrity of the head,valves and head gasket.

Your Answer

Pontiac Grand Am Experts

  • #1
    tenspeed
    Reputation
    7,880
  • #2
    John Saffrahn
    Reputation
    1,610
  • #3
    Tom Demyan
    Reputation
    1,580
View All

Related Models For Sale

Used Pontiac Grand Prix
5 Great Deals out of 74 listings starting at $1,999
Used Pontiac Firebird
17 listings starting at $8,700
Used Chevrolet Camaro
862 listings starting at $12,000
Used Chevrolet Impala
170 Great Deals out of 1,053 listings starting at $996
Used Ford Mustang
10 Great Deals out of 1,078 listings starting at $4,500
Used Toyota Camry
99 Great Deals out of 2,310 listings starting at $2,000
Used Honda Accord
88 Great Deals out of 1,028 listings starting at $750
Used Honda Civic
321 Great Deals out of 3,560 listings starting at $1,495
Used Ford F-150
594 Great Deals out of 10,665 listings starting at $3,000
Used Chevrolet Monte Carlo
17 listings starting at $4,900

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.