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If I disconnect the mass air flow sensor the engine idles high?
if i connect it the engine starts and stalls out right away
it's a 98 pontiac transport V6. and a fuel injector was just replaced. i just got a new mass air flow sensor and it is still stalling out right away when it's connected and idles above 2000rpm when i disconnect the mass air flow sensor. what could be the problem?
4 Answers
- 1 decade agoFavorite Answer
Is it getting fuel?? It would not hurt to listen for the fuel pump when you turn the key.
Source(s): I have a 98 Chevy S-!0, I just went over the 200,000 mile mark and every thing that could need replacing except for the motor I replaced. Just Check and see if its starving for fuel. - 6 years ago
If i disconnect the mass air flow sensor the car shut down what can be the problem?
- Harley DriveLv 71 decade ago
you have an air leak in the intake system when you disconnect the MAF sensor the ecu goes to emergency (get you home) mode with a slightly faster idle and a richer mixture, if it suddenly goes faster with the richer mixture then you likely have an air leak, maybe a stuck cold start valve, could be a dirty throttle valve/body which is preventing the butterfly valve from completely closing, you get a ring of oily sludge round the edge of the valve
- JUAN FRAN$$$Lv 71 decade ago
Try adjusting your idle a little bit.
Easy way to check and see if that is the problem is to hold the throttle open a little while connecting the MAFS. If it runs then you'll have to adjust your idle a little.
