low boost-any ideas?

[bac1023]

My 1997 V8 is managing only slightly over .25 bar in boost pressure. I bought the car a short time ago with 14K miles. I have tried 1-4 gears, same result. Any suggestions? Please help!!!

The car is immaculate and I got it for less than $40K. I'm hoping this isn't serious. This is my first Esprit and I love the car.

[WayneB]

If the check engine light isnt lit, the only thing I could think of was a restriction in the exhaust, maybe the catylitic converters degrading? Wastegates stuck or missajusted?(guess)

Edited July 29, 2005 by WayneB

[bac1023]

The check engine light was light at one point. It has been off for a while now. It only lit once while driving.

[WayneB]

The check engine light was light at one point.  It has been off for a while now.  It only lit once while driving.

<{POST_SNAPBACK}>

Get it OBD 2 scanned and see what the code set was

[lotusracing]

Greetings,

Low boost can be from many things most of them very minor and easy to fix.

You need the tools to find out what wrong.

First get a ODBII scanner from wayne E. This will allow you to read the lotus enhanced data.

The things to check are

wastegate capsules

frequency valve

turbos

baro and map sensor.. should give MIL if broke but not always

Would offer to talk to y adirectly but i am on trip to china at the moment.

if not solved by next week i will be available

-Larry

[jeff_hooper]

I have a 1996 V8 bought Nov 2004 from a mate that had it from 1999. He was told at a major service a few years back that it was overboosting but as the gauge read correct he ignored it.

On my first service I too was told it was overboosting and that this had been corrected (Unrelated faulty included a new capsules, a sticking actuator, faulty cat, and two new Lambda sensors). The thing is I'm told the gauge is giving a faulty excess reading. I haven't sorted this out yet and its only moves half of what it should now.

My point is consider the fact you may be being mislead by a faulty gauge.

The different I notice in driving the car since the claimed 'overboost was corrected' is that in say third gear (happens too fast in 1st and 2nd) the boost climbs then feels and sounds like it get capped of (backs off slightly) to a constant boost regardless of revs. Before the boost seemed to climbed and was linked to the revs like in 4 cylinder Esprits I have driven and my wifes Audi TT.

I don't know how other v8's feel.

Jeff

[Rob]

I have a 1996 V8 bought Nov 2004 from a mate that had it from 1999. He was told at a major service a few years back that it was overboosting but as the gauge read correct he ignored it.

On my first service I too was told it was overboosting and that this had been corrected (Unrelated faulty included a new capsules, a sticking actuator, faulty cat, and two new Lambda sensors). The thing is I'm told the gauge is giving a faulty excess reading. I haven't sorted this out yet and its only moves half of what it should now.

My point is consider the fact you may be being mislead by a faulty gauge.

The different I notice in driving the car since the claimed 'overboost was corrected' is that in say third gear (happens too fast in 1st and 2nd) the boost climbs then feels and sounds like it get capped of (backs off slightly) to a constant boost regardless of revs. Before the boost seemed to climbed and was linked to the revs like in 4 cylinder Esprits I have driven and my wifes Audi TT.

I don't know how other v8's feel.

Jeff

<{POST_SNAPBACK}>

Jeff, that sounds normal. The stock ecu is limiting the boost and that is what you are experiencing. A hi-torque (or sport 350) ecu removes the boost restricitons in all but 1st gear.

Rob