What Tachometers are not compatible?
Sep 18, 2011 | 07:26 AM
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Tach connected to DLC not showing proper RPMs
1994 4Runner
When I connect my tach to the IG of DLC1 it reads 250 yet this dash tach is reading 900. Is this an incompatible test tach that all of the manuals warn about or is this an ECM problem.
The truck idles fine but has no power on hills and absolutely no torque.
New Head Gasket
I have replaced the TPS and adjusted it. (it was bad)
Cleaned the TB and reinstalled with new gasket.
New plugs and wires
Compression 130 to 135, not great but
New ECM temperature sending unit, old one totally corroded inside
Measured resistance on Knock Sensor and cold start injector
replaced vacuum lines
checked O2 sensor
New fuel filter
Checked fuel pressure right on spec
Anybody got any ideas?
tested MAF
When I connect my tach to the IG of DLC1 it reads 250 yet this dash tach is reading 900. Is this an incompatible test tach that all of the manuals warn about or is this an ECM problem.
The truck idles fine but has no power on hills and absolutely no torque.
New Head Gasket
I have replaced the TPS and adjusted it. (it was bad)
Cleaned the TB and reinstalled with new gasket.
New plugs and wires
Compression 130 to 135, not great but
New ECM temperature sending unit, old one totally corroded inside
Measured resistance on Knock Sensor and cold start injector
replaced vacuum lines
checked O2 sensor
New fuel filter
Checked fuel pressure right on spec
Anybody got any ideas?
tested MAF
Last edited by gacinaz; Sep 18, 2011 at 02:53 PM. Reason: Reposted different Title
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