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A.P. van de Ven

A.P. ... 8/20/2016

1999 Cadillac Escalade Base 8 Cyl 5.70L


At tick over I have a surging problem.

I bought this Cadillac with cracked heads. I have replaced the heads and have the engine running and starting perfectly. I replaced the distributor cap, rotor, wires and plugs. Runs well with alot of power when revved up. When idling (ticking over) the engine surges. I had it checked on a computer and it says that there are no faults. Any guidance would be appreciated.

1 Answer


Jimm 8/20/2016

Several possibilities; engine vacuum leak, fuel supply pressure is low, air intake filter is clogged, dirty mass air flow (MAF) sensor.


A.P. van de Ven 8/20/2016

Thank you. I will check these things on monday. Where is the MAF sensor located?

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